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Metal Complexes of the Porphyrin-Functionalized Polybenzoxazine.


ABSTRACT: New porphyrin-functionalized benzoxazine (Por-BZ) in high purity and yield was synthesized in this study based on 1H and 13C NMR and FTIR spectroscopic analyses through the reduction of Schiff base formed from tetrakis(4-aminophenyl)porphyrin (TAPP) and salicylaldehyde and the subsequent reaction with CH2O. Thermal properties of the product formed through ring-opening polymerization (ROP) of Por-BZ were measured using DSC, TGA and FTIR spectroscopy. Because of the rigid structure of the porphyrin moiety appended to the benzoxazine unit, the temperature required for ROP (314 °C) was higher than the typical Pa-type benzoxazine monomer (ca. 260 °C); furthermore, poly(Por-BZ) possessed a high thermal decomposition temperature (Td10 = 478 °C) and char yield (66 wt%) after thermal polymerization at 240 °C. An investigation of the thermal and luminescence properties of metal-porphyrin complexes revealed that the insertion of Ni and Zn ions decreased the thermal ROP temperatures of the Por-BZ/Ni and Por-BZ/Zn complexes significantly, to 241 and 231 °C, respectively. The metal ions acted as the effective promoter and catalyst for the thermal polymerization of the Por-BZ monomer, and also improved the thermal stabilities after thermal polymerization.

SUBMITTER: Zhang G 

PROVIDER: S-EPMC8839356 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature

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Metal Complexes of the Porphyrin-Functionalized Polybenzoxazine.

Zhang Guohu G   El-Mahdy Ahmed F M AFM   Ahmed Lamiaa Reda LR   Matsagar Babasaheb M BM   Al-Saeedi Sameerah S   Kuo Shiao-Wei SW   Wu Kevin C-W KC  

Polymers 20220123 3


New porphyrin-functionalized benzoxazine (Por-BZ) in high purity and yield was synthesized in this study based on <sup>1</sup>H and <sup>13</sup>C NMR and FTIR spectroscopic analyses through the reduction of Schiff base formed from tetrakis(4-aminophenyl)porphyrin (TAPP) and salicylaldehyde and the subsequent reaction with CH<sub>2</sub>O. Thermal properties of the product formed through ring-opening polymerization (ROP) of Por-BZ were measured using DSC, TGA and FTIR spectroscopy. Because of th  ...[more]

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