title: Synthesis and photophysical properties of a supramolecular host-guest assembly constructed by fullerenes and tryptamine modified hypocrellin.
abstract: The metal coordination polymer of hypocrellin A bearing tryptamine motif (M-DTrpHA) can include fullerene via a two-point interaction, involving π-π stacking and electron donor-acceptor interaction. The 1:1 host-guest system M-DTrpHA/fullerene exhibits a moderate association constant K(a) (6.62 × 10(4) to 6.46 × 10(5) M(-1)). Both of the metal ions in M-DTrpHA and the substituents connected to the fullerene core play important roles in stabilizing the M-DTrpHA/fullerene complex. Transient absorption spectral and NIR absorption spectral results demonstrate that, in the M-DTrpHA/fullerene system, efficient photoinduced electron transfer from the tryptamine group in M-DTrpHA to fullerene may occur, resulting in a long-lived fullerene anion radical. The observed order of quantum yield (Φ(ET)(T)) and rate constants (K(ET)(T)) for electron transfer via (3)C(60)(*) is Y(3+)-DTrpHA > La(3+)-DTrpHA > DTrpHA, consistent with their binding ability to C(60). The nanostructure of M-DTrpHA is rearranged to form an interpenetrating network after interaction with fullerene.
authors.affiliation: Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China. ouzhize@nwpu.edu.cn
authors.forename: Zhize
authors.initials: Z
authors.lastname: Ou
authors.forename: Helin
authors.initials: H
authors.lastname: Jin
authors.forename: Yunyan
authors.initials: Y
authors.lastname: Gao
authors.forename: Shayu
authors.initials: S
authors.lastname: Li
authors.forename: Haixia
authors.initials: H
authors.lastname: Li
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.forename: Xuesong
authors.initials: X
authors.lastname: Wang
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Yang
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D055664:Electrochemical Techniques; D037741:Fullerenes / Q000737:chemistry*; D010569:Perylene / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D019800:Phenol; D011809:Quinones / Q000138:chemical synthesis / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared; D014363:Tryptamines / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D037741:Fullerenes; D011809:Quinones; D014363:Tryptamines; D019800:Phenol; C030820:tryptamine; D010569:Perylene; C048388:hypocrellin A