《Enzymatic synthesis of biobased polyesters utilizing aromatic diols as the rigid component》 was written by Pellis, Alessandro; Weinberger, Simone; Gigli, Matteo; Guebitz, Georg M.; Farmer, Thomas J.. Formula: C7H9NO2 And the article was included in European Polymer Journal in 2020. The article conveys some information:
In the present work, the biocatalyzed synthesis of a series of aromatic-aliphatic polyesters based on the aliphatic diesters di-Me succinate, di-Me adipate and di-Me sebacate and the aromatic diols 2,5-bis(hydroxymethyl)furan, 3,4-bis(hydroxymethyl)furan and 2,6-pyridinedimethanol were investigated. A similar series of polyesters based on the petroleum-based 1,3-benzenedimethanol, 1,4-benzenedimethanol and 1,4-benzenediethanol were also synthesized for comparison. Data show that the enzymic syntheses were successful starting from all diols, with the obtained polymers having isolated yields between 67 and over 90%, number average mol. weights between 3000 Da and 5000 Da and d.p. (DP) of 6-18 (based on the used aliphatic diesters and aromatic diols) when polymerized in di-Ph ether as solvent. Only using 3,4-bis(hydroxymethyl)furan as the diol led to shorter oligomers with isolated yields around 50% and DPs of 3-5. DSC and TGA thermal analyses show clear correlation between polymer crystallinity and aliphatic carbon chain length of the diester. In the experimental materials used by the author, we found 2,6-Pyridinedimethanol(cas: 1195-59-1Formula: C7H9NO2)
2,6-Pyridinedimethanol(cas: 1195-59-1) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.Formula: C7H9NO2
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