Healthcare careers for chemists are once again largely based in laboratories, Product Details of 2935-35-5, although increasingly there is opportunity to work at the point of care, helping with patient investigation. 2935-35-5, Name is H-Phg-OH, SMILES is O=C(O)[C@@H](N)C1=CC=CC=C1, belongs to phthalazine compound. In a document, author is Fu, Xian, introduce the new discover.
This article discloses a series of processable multiple phthalazinone-based ether nitriles with various contents of phthalonitrile ends (compounds 4a-4e) and compares the cyclization feasibility of terminal phthalonitrile and pendant cyano group. Compounds 4a-4e were synthesized by facile polycondensation of excess 4-(4-hydroxyphenyl)-2,3-phthalazine-1-one (compound 1) with 2,6-difluorobenzonitrile (compound 2), followed by end-capping of 4-nitrophthalonitrile (compound 4). Their number-averaged molecular weights (M(n)s) and glass transitions can be well tailored by adjusting reactant ratio. Compounds 4a-4e are readily soluble in N-methyl-2-pyrrolidone, N, N-dimethylacetamide, dimethyl sulfoxide, N, N-dimethylformamide, and chloroform and hence can be processed either from their solutions or from melts. On mixing with trace amount of bis(4-aminophenyl) sulfone (compound 5), all oligomers were cross-linked to insoluble networks (compounds 6a-6d) except the high-molecular-weight 4e with the lowest phthalonitrile content. The phthalonitrile is found to be an effectively reactive site for cross-linking, whereas the pendant cyano group in multiple ether nitriles hardly undergoes any reaction confirmed by model reaction. Compounds 6a-6d maintain good structural integrity upon heating to 450 degrees C and exhibit superior thermal stabilities compared with the known phthalazinone polymers. Compounds 6a-6d exhibit high flexural strength (98-111 MPa) as well as limited water absorption (2.2-2.7 wt%) under ambient conditions over a course of 30 days, permitting them to be promising candidates for organic electronics and automotives.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem