and second-generation polyphenylene dendrimers were synthesized starting from benzophenone as core. Variation of the size and the density of the dendrimer shell resulted in different isolation of the cores. To investigate the effect of shielding upon the reactivity of the core, chemical functionalizations as well as the alkali-metal reduction of the encapsulatedbenzophenone core were performed. The
Spherical polyphenylene dendrimers via Diels–Alder reactions: the first example of an A4B building block in dendrimer chemistry
作者:Frank Morgenroth
DOI:10.1039/a801395k
日期:——
The [2+4]cycloaddition of the novel A4B building block 2,3,4,5-tetrakis(4-triisopropylsilylethynylphenyl)cyclopenta-2,4-dienone 3 with 3,3â,5,5â-tetraethynylbiphenyl 1 allows the rapid synthesis of a spherical polyphenylene nanoparticle with 102 benzene rings.
A Novel Approach for the Oxidative Degradation of Organic Pollutants in Aqueous Solutions Mediated by Iron Tetrasulfophthalocyanine under Visible Light Radiation
An efficient approach has been developed to decompose toxic organic pollutants. The photodegradation of Rhodamine B (RhB), salicylic acid, and Orange It was examined in the presence of iron tetrasulfophthalocyanine ([Fe(PcS)]) and H,07 under visible irradiation. It was found that under visible light irradiation, organic pollutants in the [Fe(PcS)]/H2O2 system can be rapidly degraded, but the concentration of [Fe(PcS)] remains nearly unchanged, and this indicates that [Fe(PcS)] has a good catalytic character. EPR results and other experimental results suggest that the light-activated reaction process involves the formation and reaction of HO. radicals. On the basis of the experimental results. a possible reaction mechanism for the degradation of organic pollutants under visible light illumination in the aqueous [Fe(PcS)]/H2O2 solutions is proposed.
A fan-shaped synthetic chiral nanographene
作者:Haonan Shi、Bangyuan Xiong、Ying Chen、Chaojun Lin、Jiajian Gu、Yanpeng Zhu、Jiaobing Wang