New discoveries in chemical research and development in 2021. The appropriate choice of redox mediator can avoid electrode passivation and overpotential, which strongly inhibit the efficient activation of substrates in electrolysis.2377-81-3, Name is Tetrafluoroisophthalonitrile, molecular formula is C8F4N2. In an article, author is Kang, In Soo,once mentioned of 2377-81-3, COA of Formula: https://www.ambeed.com/products/2377-81-3.html.
Positive-tone photosensitive polybenzoxazoles (PSPBOs) based on poly(o-hydroxyamide) (PHA) precursors were synthesized from a reaction of 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (Bis-AP-AF), 4,4′-oxybisbenzoyl chloride (OBC), and maleic anhydride as an end-capper to control the degree of polymerization. The prepared photoresists were composed of the synthesized PHA precursors and diazonaphthoquinone (DNQ) photo-sensitizer. The photolithographic properties of the PSPBO according to the end-capper contents were investigated. Clear positive-tone images were obtained on the PHA precursor films, which had been irradiated with 450 mJ/cm(2) of the i-line and developed using a 2.38 wt. % tetramethylammonium hydroxide (2.38% TMAH) solution. The PHA precursor fully converted to a PBO pattern by heating to 350 degrees C for 1 h under a nitrogen atmosphere.
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Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem