Day: December 30, 2021

Application In Synthesis of 4,4′-Dibromobiphenyl. Yamakawa, S; Wada, K; Hidaka, M; Hanasaki, T; Akagi, K in [Yamakawa, Shohei; Wada, Kohei; Hidaka, Masatomo; Akagi, Kazuo] Kyoto Univ, Dept Polymer Chem, Kyoto 6158510, Japan; [Hanasaki, Tomonori] Ritsumeikan Univ, Dept Appl Chem, Shiga 5258577, Japan; [Akagi, Kazuo] Ritsumeikan Univ, Res Org Sci & Technol, Shiga 5258577, Japan published Chiral Liquid-Crystalline Ionic Liquid Systems Useful for Electrochemical Polymerization that Affords Helical Conjugated Polymers in 2019, Cited 67. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

Ionic liquids bearing both liquid crystallinity and chirality are potentially applicable for chiral electrochemical syntheses and polymerizations. In this study, two types of chiral nematic liquid-crystalline ionic liquids (N*-LCILs) are developed to achieve asymmetric electrochemical polymerization without a supporting electrolyte and even a chiral dopant. N*-LCILs are prepared i) by adding an axially chiral binaphthyl derivative as an external chiral dopant to imidazolium cation-based LCILs or ii) by incorporating a chiral binaphthyl phosphate as a counter anion in LCILs. Helical poly(3,4-ethylenedioxythiophene) (H-PEDOT) films are successfully synthesized through electrochemical polymerization of a dimer- or trimer-type 3,4-ethylenedioxythiophene (EDOT) monomer in an N*-LCIL, where N*-LCIL plays the role of both an asymmetric solvent and a supporting electrolyte. H-PEDOT films have helically pi-stacked structures of conjugated chains and spiral morphologies consisting of one-handed screwed fibril bundles. The plausible mechanism of the asymmetric electrochemical polymerization of EDOT in N*-LCIL is proposed to elucidate the correlation of helical sense between the helically pi-stacked chains, screwed fibril bundles, and N*-LCIL. The two present types of N*-LCILs are the first to enable supporting electrolyte-free asymmetric electrochemical polymerization, and they have potential applications in various types of chiral electrochemical syntheses, expanding the potential utility of ionic liquids.

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Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Recently I am researching about BIS(TRIARYLAMINE) DICATIONS; BUILDING-BLOCKS; DIRADICALOIDS; LIGANDS; ANALOGS; CARBENES; RADICALS; SINGLET, Saw an article supported by the Tata Institute of Fundamental Research (TIFR) Hyderabad, Gopanpally, Hyderabad, Telangana, India from the Department of Atomic Energy (DAE), Government of India, India; SERB, IndiaDepartment of Science & Technology (India)Science Engineering Research Board (SERB), India [CRG/2019/003415]. Computed Properties of C12H8Br2. Published in ROYAL SOC CHEMISTRY in CAMBRIDGE ,Authors: Maiti, A; Chandra, S; Sarkar, B; Jana, A. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl

Thiele, Chichibabin and Muller hydrocarbons are considered as classical Kekule diradicaloids. Herein we report the synthesis and characterization of acyclic diaminocarbene (ADC)-based Thiele, Chichibabin, and Muller hydrocarbons. The calculated singlet-triplet energy gaps are Delta ES-T = -27.96, -3.70, -0.37 kcal mol(-1), respectively, and gradually decrease with the increasing length of the pi-conjugated spacer (p-phenylene vs. p,p ‘-biphenylene vs. p,p ”-terphenylene) between the two ADC-scaffolds. In agreement with the calculations, we also experimentally observed the enhancement of paramagnetic diradical character as a function of the length of the pi-conjugated spacer. ADC-based Thiele’s hydrocarbon is EPR silent and exhibits very well resolved NMR spectra, whereas ADC-based Muller’s hydrocarbon displays EPR signals and featureless NMR spectra at room temperature. The spacer also has a strong influence on the UV-Vis-NIR spectra of these compounds. Considering that our methodology is modular, these results provide a convenient platform for the synthesis of an electronically modified new class of carbon-centered Kekule diradicaloids.

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Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

An article Origin of the isotropic motion in crystalline molecular rotors with carbazole stators WOS:000465341000003 published article about DYNAMICS; WAVE; ROTATION; GYROTOP in [Colin-Molina, Abraham; Garcia-Quezada, Eduardo; Toscano, Ruben A.; Rodriguez-Molina, Braulio] Univ Nacl Autonoma Mexico, Inst Quim, Ciudad De Mexico 04510, Mexico; [Jellen, Marcus J.] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA; [Eduardo Cifuentes-Quintal, Miguel; Murillo, Fernando; Barroso, Jorge; Merino, Gabriel] Ctr Invest & Estudios Avanzados, Dept Fis Aplicada, Km 6 Antigua Carretera Progreso,Apdo Postal 73, Merida 97310, Yuc, Mexico; [Perez-Estrada, Salvador] Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Area Acad Quim, Km 4-5 Carretera Pachuca Tulancingo, Mineral De La Reforma 42184, Hidalgo, Mexico in 2019, Cited 46. Name: 4,4′-Dibromobiphenyl. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4

Herein we report two crystalline molecular rotors 1 and 4 that show extremely narrow signals in deuterium solid-state NMR spectroscopy. Although this line shape is typically associated with fast-moving molecular components, our VT 2H NMR experiments, along with X-ray diffraction analyses and periodic DFT computations show that this spectroscopic feature can also be originated from low-frequency intramolecular rotations of the central phenylene with a cone angle of 54.7 that is attained by the cooperative motion of the entire structure that distorts the molecular axis to rotation. In contrast, two isomeric structures (2 and 3) do not show a noticeable intramolecular rotation, because their crystallographic arrays showed very restricting close contacts. Our findings clearly indicate that the multiple components and phase transitions in crystalline molecular machines can work in concert to achieve the desired motion.

Welcome to talk about 92-86-4, If you have any questions, you can contact Colin-Molina, A; Jellen, MJ; Garcia-Quezada, E; Cifuentes-Quintal, ME; Murillo, F; Barroso, J; Perez-Estrada, S; Toscano, RA; Merino, G; Rodriguez-Molina, B or send Email.. Name: 4,4′-Dibromobiphenyl

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

An article Reducing the Exciton Binding Energy of Donor-Acceptor-Based Conjugated Polymers to Promote Charge-Induced Reactions WOS:000476452700031 published article about COVALENT TRIAZINE FRAMEWORKS; MESOPOROUS CARBON NITRIDES; HYDROGEN-PRODUCTION; PHOTOCATALYSTS in [Lan, Zhi-An; Zhang, Guigang; Chen, Xiong; Zhang, Yongfan; Wang, Xinchen] Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Fujian, Peoples R China; [Zhang, Kai A., I] Max Planck Inst Polymer Res, Ackermannweg 10, D-55128 Mainz, Germany in 2019, Cited 47. Name: 4,4′-Dibromobiphenyl. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4

Exciton binding energy has been regarded as a crucial parameter for mediating charge separation in polymeric photocatalysts. Minimizing the exciton binding energy of the polymers can increase the yield of charge-carrier generation and thus improve the photocatalytic activities, but the realization of this approach remains a great challenge. Herein, a series of linear donor-acceptor conjugated polymers has been developed to minimize the exciton binding energy by modulating the charge-transfer pathway. The results reveal that the reduced energy loss of the charge-transfer state can facilitate the electron transfer from donor to acceptor, and thus, more electrons are ready for subsequent reduction reactions. The optimized polymer, FSO-FS, exhibits a remarkable photochemical performance under visible light irradiation.

Name: 4,4′-Dibromobiphenyl. Welcome to talk about 92-86-4, If you have any questions, you can contact Lan, ZA; Zhang, GG; Chen, X; Zhang, YF; Zhang, KAI; Wang, XC or send Email.

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Authors Huang, ZY; Xu, ZH; Huang, TT; Gray, V; Moth-Poulsen, K; Lian, TQ; Tang, ML in AMER CHEMICAL SOC published article about PHOTON UP-CONVERSION; LIGHT-EMITTING-DIODES; LONG-RANGE ELECTRON; BRIDGE ENERGETICS; TRANSFER DYNAMICS; TRANSFER RATES; NANOCRYSTALS; CHARGE; WIRE; TRANSPORT in [Huang, Zhiyuan; Huang, Tingting; Tang, Ming Lee] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA; [Xu, Zihao; Lian, Tianquan] Emory Univ, Dept Chem, 1515 Pierce Dr, Atlanta, GA 30322 USA; [Gray, Victor; Moth-Poulsen, Kasper] Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden; [Gray, Victor] Uppsala Univ, Angstrom Lab, Dept Chem, S-75120 Uppsala, Sweden in 2020, Cited 59. Quality Control of 4,4′-Dibromobiphenyl. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4

Efficient energy transfer is particularly important for multiexcitonic processes like singlet fission and photon upconversion. Observation of the transition from short-range tunneling to long-range hopping during triplet exciton transfer from CdSe nanocrystals to anthracene is reported here. This is firmly supported by steady-state photon upconversion measurements, a direct proxy for the efficiency of triplet energy transfer (TET), as well as transient absorption measurements. When phenylene bridges are initially inserted between a CdSe nanocrystal donor and anthracene acceptor, the rate of TET decreases exponentially, commensurate with a decrease in the photon upconversion quantum efficiency from 11.6% to 4.51% to 0.284%, as expected from a tunneling mechanism. However, as the rigid bridge is increased in length to 4 and 5 phenylene units, photon upconversion quantum efficiencies increase again to 0.468% and 0.413%, 1.5 1.6 fold higher than that with 3 phenylene units (using the convention where the maximum upconversion quantum efficiency is 100%). This suggests a transition from exciton tunneling to hopping, resulting in relatively efficient and distance-independent TET beyond the traditional 1 nm Dexter distance. Transient absorption spectroscopy is used to confirm triplet energy transfer from CdSe to transmitter, and the formation of a bridge triplet state as an intermediate for the hopping mechanism. This first observation of the tunneling-to-hopping transition for long-range triplet energy transfer between nanocrystal light absorbers and molecular acceptors suggests that these hybrid materials should further be explored in the context of artificial photosynthesis.

Welcome to talk about 92-86-4, If you have any questions, you can contact Huang, ZY; Xu, ZH; Huang, TT; Gray, V; Moth-Poulsen, K; Lian, TQ; Tang, ML or send Email.. Quality Control of 4,4′-Dibromobiphenyl

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Recommanded Product: 4,4′-Dibromobiphenyl. Liu, XL; Li, MG; Han, T; Cao, B; Qiu, ZJ; Li, YY; Li, QY; Hu, YB; Liu, ZY; Lam, JWY; Hu, XL; Tang, BZ in [Liu, Xiaolin; Han, Ting; Qiu, Zijie; Li, Yuanyuan; Li, Qiyao; Hu, Yubing; Liu, Zhiyang; Lam, Jacky W. Y.; Tang, Ben Zhong] Hong Kong Univ Sci & Technol, Chinese Natl Engn Res Ctr Tissue Restorat & Recon, Dept Chem & Biol Engn,Kowloon, Inst Mol Funct Mat,Inst Adv Study,Dept Chem,Hong, Clear Water Bay, Hong Kong, Peoples R China; [Li, Mengge; Cao, Bing; Hu, Xianglong] South China Normal Univ, Coll Biophoton, Minist Educ, Key Lab Laser Life Sci, Guangzhou 510631, Guangdong, Peoples R China; [Li, Mengge; Cao, Bing; Hu, Xianglong] South China Normal Univ, Coll Biophoton, Inst Laser Life Sci, Guangzhou 510631, Guangdong, Peoples R China; [Liu, Xiaolin; Han, Ting; Qiu, Zijie; Li, Yuanyuan; Li, Qiyao; Hu, Yubing; Liu, Zhiyang; Lam, Jacky W. Y.; Tang, Ben Zhong] HKUST Shenzhen Res Inst, 9 Yuexing 1st Rd,South Area,Hitech Pk, Shenzhen 518057, Peoples R China; [Tang, Ben Zhong] South China Univ Technol, State Key Lab Luminescent Mat & Devices, SCUT HKUST Joint Res Inst, Ctr Aggregat Induced Emiss, Guangzhou 510640, Guangdong, Peoples R China published In Situ Generation of Azonia-Containing Polyelectrolytes for Luminescent Photopatterning and Superbug Killing in 2019, Cited 63. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

Polyelectrolytes play an important role in both natural biological systems and human society, and their synthesis, functional exploration, and profound application are thus essential for biomimicry and creating new materials. In this study, we developed an efficient synthetic methodology for in situ generation of azonia-containing polyelectrolytes in a one-pot manner by using readily accessible nonionic reactant in the presence of commercially available cheap ionic species. The resulting polyelectrolytes are emissive in the solid state and can readily form luminescent photopatterns with different colors. The azonia-containing polyelectrolytes possess extraordinary potency of reactive oxygen species (ROS) generation, enabling them to impressively kill methicillin-resistant Staphylococcus aureus (MRSA), a drug resistant superbug, both in vitro and in vivo.

Recommanded Product: 4,4′-Dibromobiphenyl. Bye, fridends, I hope you can learn more about C12H8Br2, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Computed Properties of C12H8Br2. Budy, SM; Khan, M; Chang, X; Iacono, ST; Son, DY in [Budy, Stephen M.; Khan, Mansoor; Chang, Xu; Son, David Y.] Southern Methodist Univ, Dept Chem, Dallas, TX 75275 USA; [Iacono, Scott T.] US Air Force Acad, Dept Chem, Labs Adv Mat, Colorado Springs, CO 80840 USA; [Iacono, Scott T.] US Air Force Acad, Chem Res Ctr, Labs Adv Mat, Colorado Springs, CO 80840 USA published Semi-fluorinated polyarylenes: Microwave-assisted synthesis andstructure-propertyrelationships in 2020, Cited 59. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

A series of three fluorine containing and three non-fluorinated Diels-Alder step-growth polyarylene polymers and copolymers was synthesized via conventional oil bath heating (days/weeks). A drastic time reduction was realized with a microwave-assisted polymerization (hours). The polymers were characterized by multinuclear (H-1,C-13, and(19)F) NMR and attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, thermal analysis (thermogravimetric analysis [TGA], differential scanning calorimetry [DSC], and dynamic mechanical analysis [DMA]), gel permeation chromatography, X-ray diffraction (XRD), water contact analysis, and refractive index (RI) measurements. The NMR spectra indicated a mixture ofparaandmetaconformations through the polymer backbone increasing to moreparawith greater fluorine content. TGA revealed the fluorine-containing polyarylenes possessed the highest char yields at almost 80% at 1000 degrees C under nitrogen, and all the polyarylenes possessed onset of degradation temperatures above 550 degrees C under nitrogen and air atmospheres. XRD analysis indicated more ordering for the fluorine-containing polyarylenes which afforded the high char yields. DMA gave storage moduli values in the range of 1-10 GPa for the polyarylenes. Molecular weights for all samples were above 100 kg/mol. Water contact angles did not change with fluorine content due to the shielding effect of the pendant phenyl groups. However, the RI decreased to 1.6497 at 632.8 nm for the polyarylene with the highest fluorine content.

Computed Properties of C12H8Br2. Welcome to talk about 92-86-4, If you have any questions, you can contact Budy, SM; Khan, M; Chang, X; Iacono, ST; Son, DY or send Email.

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Name: 4,4′-Dibromobiphenyl. Recently I am researching about ELECTRONIC RELAXATION PROCESSES; ORGANOSILICON COMPOUNDS; MOLECULAR-CONFORMATION; FLUORESCENCE; ABSORPTION; ROTATION; SPECTRA, Saw an article supported by the Faculty of Chemistry, Adam Mickiewicz University, Poznan, Poland; National Science Centre, PolandNational Science Centre, Poland [UMO-2017/25/N/ST4/00299]. Published in ROYAL SOC CHEMISTRY in CAMBRIDGE ,Authors: Rachuta, K; Bayda-Smykaj, M; Koput, J; Hug, GL; Majchrzak, M; Marciniak, B. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl

In the course of studying silicon modifications to improve emission properties of commonly used organic compounds, biphenyl with dimethylsilylvinyl groups in the para position (3-Si) was investigated. A comparative study was performed on the exact C-analogue (3-C) and expanded to biphenyl and dimethylbiphenyl to emphasize the general trend observed. Compound 3-Si displayed emission properties clearly different than all of the investigated hydrocarbon compounds, i.e. twice stronger fluorescence (phi(f) = 0.6) and a 3-times larger radiative rate constant as compared to 3-C in acetonitrile. Searching for the source of the unique emission of 3-Si, singlet and triplet processes were investigated for all of the compounds using steady-state and time-resolved methods, and their principal photophysical parameters are reported. Experimental work was supported by the theoretical predictions obtained using the EOM-CCSD method. The results led to the conclusion that the strong emission of 3-Si must be due to silicon’s presence that enhanced intensity borrowing from the strongly allowed S0 -> S2 transition and the larger S1 -> S0 transition moment.

Welcome to talk about 92-86-4, If you have any questions, you can contact Rachuta, K; Bayda-Smykaj, M; Koput, J; Hug, GL; Majchrzak, M; Marciniak, B or send Email.. Name: 4,4′-Dibromobiphenyl

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Name: 4,4′-Dibromobiphenyl. In 2020 POLYM BULL published article about CONDUCTING POLYMERS; SELECTIVE DETECTION; CARBAZOLE; 3,4-ETHYLENEDIOXYTHIOPHENE; POLY(3,4-ETHYLENEDIOXYTHIOPHENE); ELECTROPOLYMERIZATION; SEMICONDUCTORS; MULTILAYERS; THIOPHENE; FILMS in [Escalona, Cindy; Ahumada, Juan C.; Soto, Juan P.] Pontificia Univ Catolica Valparaiso, Fac Ciencias, Lab Polimeros, Inst Quim, Ave Brasil 2950, Valparaiso, Chile; [Escalona, Cindy; Estrany, Francesc; Borras, Nuria; Aleman, Carlos] Univ Politecn Cataluna, EEBE, Dept Engn Quim, C Eduard Maristany 10-14, Barcelona 08019, Spain; [Estrany, Francesc; Aleman, Carlos] Univ Politecn Cataluna, Barcelona Res Ctr Multiscale Sci & Engn, C Eduard Maristany 10-14, Barcelona 08019, Spain in 2020, Cited 47. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

The preparation of copolymers bearing N-methylcarbazole and 2,7-linked 3,4-ethylenedioxythiophene units has been carried out using the N-methyl-2,7-di(2-(3,4-ethylenedioxythienyl))carbazole monomer, which has been chemically synthesized through the Stille coupling reaction of 2,7-dibromo-N-methylcarbazole and tributyl-stannylated 3,4-ethylenedioxythiophene. Then, the monomer was electropolymerized by chronoamperometry in acetonitrile with 0.1 M LiClO4 under a constant potential of 0.70 V and using steel AISI 316 electrodes. The electrochemical activity and stability, charge-discharge capacity, charge transfer resistance and surface properties (i.e. morphology, topography and wettability) of the resulting polymer have been characterized and compared with those reported for poly(3,4-ethylenedioxythiophene). Finally, the polymer has been obtained by potentiodynamic sweep, applying around 100 cyclic voltammetry steps to an acetonitrile solution of the N-methyl-2,7-di(2-(3,4-ethylenedioxythienyl))carbazole monomer with 0.1 M LiClO4. Results show that although this technique has been mostly used to electropolymerize diheteroaromatic-subtituted carbazoles, the resulting material presents serious disadvantages with respect to that produced by chronoamperometry under a constant potential.

Welcome to talk about 92-86-4, If you have any questions, you can contact Escalona, C; Estrany, F; Ahumada, JC; Borras, N; Soto, JP; Aleman, C or send Email.. Name: 4,4′-Dibromobiphenyl

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

COA of Formula: C12H8Br2. In 2020 CHEMOSPHERE published article about CHEMICALS in [Wassenaar, Pim N. H.; Verbruggen, Eric M. J.; Peijnenburg, Willie J. G. M.] Natl Inst Publ Hlth & Environm RIVM, Ctr Safety Subst & Prod, POB 1, NL-3720 BA Bilthoven, Netherlands; [Wassenaar, Pim N. H.; Cieraad, Ellen; Peijnenburg, Willie J. G. M.; Vijver, Martina G.] Leiden Univ, Inst Environm Sci CML, POB 9518, NL-2300 RA Leiden, Netherlands in 2020, Cited 43. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

The fish bioconcentration factor (BCF) is an important aspect within bioaccumulation assessments. Several factors have been suggested to influence BCF values – including species, developmental stage, mixture exposure, and calculation method. However, their exact contribution to variance in BCF values is unknown. Within this study we assessed the relative impact of these test characteristics on BCF values and analyzed the reproducibility of aquatic exposure bioconcentration tests. Linear mixed effects analyses were performed on a newly develop database to investigate the relationship between the response variable (i.e. lipid normalized log BCF values) and several test characteristics as fixed effects. Lower BCF values were observed for substances that were simultaneously applied with high molecular weight polycyclic aromatic hydrocarbons compared to single substance exposure (with an average difference of -0.81 log BCF). Also, lower BCFs upon kinetic determination were observed compared to steady-state BCFs (log BCF -0.27), and lower BCFs for species from the Ostariophysi subcohort level (log BCF -0.17 to -0.15). In addition, data analysis showed high variation within BCF values for single substances (average SD = log BCF 0.21), which questions the robustness of the current bioaccumulation assessments. For example, the 95% confidence range of a BCF value of 2500 ranges from 953 (‘not-bioaccumulative’) to 6561 (‘very bioaccumulative’). Our results show that the use of one single BCF leads to a high uncertainty in bioaccumulation assessments. We strongly recommend that within future bioconcentration studies, the used experimental design and test conditions are described in detail and justified to support solid interpretation. (C) 2019 The Authors. Published by Elsevier Ltd.

COA of Formula: C12H8Br2. Welcome to talk about 92-86-4, If you have any questions, you can contact Wassenaar, PNH; Verbruggen, EMJ; Cieraad, E; Peijnenburg, WJGM; Vijver, MG or send Email.

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem