Synthesis and Photophysical Study of Hexa-peri-hexabenzocoronene Modified with PAMAM Dendrimers

doi:10.7517/j.issn.1674-0475.2013.01.004

Abstract

Abstract: A series of hexa-peri-hexabenzocoronene(HBC) modified with PAMAM dendrimers, HBC-C₆-PAMAM-D_m(m=0.5, 1.5, 2.5), were synthesized and their structures were characterized by IR, ¹HNMR, ¹³CNMR and MALDI TOF mass spectra. Steady state photophysical studies of these compounds in tetrahydrofuran, acetonitrile, and dichloromethane indicated that HBC-C₆-PAMAM-D_mform aggregates in solution. The absorption and emission of HBC units are affected by the peripheral dendritic backbones due to the vibrational coupling between HBC and the dendritic moieties. The disorder of the vibrational state of HBC increases as dendrimer generation increases.

Key words: hexa-peri-hexabenzocoronene, PAMAM dendrimer, aggregate, absorption, fluorescence

CLC Number:

WEI Heng-xing, ZENG Yi, CHEN Jin-ping, LI Ying-ying, LI Yi. Synthesis and Photophysical Study of Hexa-peri-hexabenzocoronene Modified with PAMAM Dendrimers[J]. Imaging Science and Photochemistry, 2013, 31(1): 24-32.

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