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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis and characterization of an A(2)BC type phthalocyanine and its visible-light-responsive photocatalytic H-2 production performance on graphitic carbon nitride
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Synthesis and characterization of an A(2)BC type phthalocyanine and its visible-light-responsive photocatalytic H-2 production performance on graphitic carbon nitride

机译：A（2）BC型酞菁的合成，表征及其对石墨氮化碳的可见光响应光催化H-2生产性能

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A highly asymmetric A(2)BC type zinc phthalocyanine (Zn-di-PcNcTh) has been designed and synthesized. The Zn-di-PcNcTh used a pi electron rich thiophene ring in place of the benzenoid rings of phthalocyanine which acted as an electron donor, diphenylphenoxy substituents to retard aggregation and a carboxyl- naphthalene unit as an electron acceptor. The asymmetric phthalocyanine shows a strongly split Q-band and wide spectral absorption in the visibleear-IR light region, which can extend the spectral response region of graphitic carbon nitride (g-C3N4) from similar to 450 nm to more than 800 nm. By using it as a sensitizer of 1.0 wt% Pt-loaded graphitic carbon nitride (g-C3N4), the experimental results indicate that Zn-di-PcNcTh-Pt/g-C3N4 shows a H-2 production efficiency of 249 mu mol h(-1) with an impressive turnover number (TON) of 9960.8 h(-1) under visible light (lambda >= 420 nm) irradiation, much higher than that of pristine Pt/g-C3N4. Owing to the introduction of a highly bathochromic shift of 3,4-dicyanothiophene and the valuable "push-pull" effect from the thiophene (electron donor) to the carboxyl-naphthalene (electron acceptor) unit, Zn-di-PcNcTh/g-C3N4 gives an extremely high apparent quantum yield (AQY) of 2.44%, 3.05%, and 1.53% under 700, 730, and 800 nm monochromatic light irradiation, respectively, under optimized photocatalytic conditions.
机译：设计并合成了高度不对称的A（2）BC型锌酞菁（Zn-di-PcNcTh）。 Zn-di-PcNcTh使用富π电子的噻吩环代替用作电子供体的酞菁苯环，阻滞聚集的二苯苯氧基取代基和用作电子受体的羧基萘单元。非对称酞菁在可见/近红外光区域显示强烈分裂的Q波段和宽光谱吸收，这可以将石墨碳氮化物（g-C3N4）的光谱响应区域从相似的450 nm扩展到超过800 nm 。通过将其用作1.0 wt％负载的Pt石墨氮化碳（g-C3N4）的敏化剂，实验结果表明Zn-di-PcNcTh-Pt / g-C3N4的H-2生产效率为249μmol h （-1）在可见光（λ> = 420 nm）辐照下的转折数（TON）为9960.8 h（-1），远高于原始Pt / g-C3N4。由于引入了3,4-二氰基噻吩的高度红移和从噻吩（电子供体）到羧基萘（电子受体）单元Zn-di-PcNcTh / g-的有价值的“推挽”效应在优化的光催化条件下，C3N4在700、730和800 nm单色光照射下的表观量子产率（AQY）分别高达2.44％，3.05％和1.53％。

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