Preparation and photochemistry of single wall carbon nanotubes having covalently anchored viologen units

被引:31
作者
Alvaro, M
Aprile, C
Atienzar, P
Garcia, H [1 ]
机构
[1] Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia 46022, Spain
[2] Univ Politecn Valencia, Dept Quim, Valencia 46022, Spain
关键词
D O I
10.1021/jp044273i
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
An asymmetrically substituted viologen (V) has been covalently anchored to single wall carbon nanotube (SWNT) through an ester linkage by reacting chlorinated purified SWNT with N-methyl-N-(6-hydroxyhexyl)4,4'-bipyridine. Spectroscopic evidence for the covalent bond of viologen in V-SWNT comes from the chemical shift of the -CH2-O-CO- methylene group in H-1 NMR and from the variations of the 1590 and 1380 cm(-1) bands in the Raman spectrum of the V-SWNT with respect to SWNT. The fact that the estimated quenching constant of the SWNT emission by viologen is about 2 orders of magnitude higher than the diffusion coefficient indicates the occurrence of a static quenching arising from the formation of a nonemissive viologen-SWNT complex. Laser flash photolysis shows the formation of viologen radical cation upon direct excitation of V-SWNT. The viologen moiety of V-SWNT is able to form a charge-transfer complex with 2,6-dimethoxynaphthalene (DMN) as evidenced by optical spectroscopy and, upon selective photoexcitation in the charge-transfer band, this V-DMN complex anchored to SWNT gives rise to the corresponding charge separated state decaying in the submillisecond time scales.
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收藏
页码:7692 / 7697
页数:6
相关论文
共 59 条
  • [1] Photochemistry of charge-transfer complexes in a viologen periodic mesoporous organosilica:: Time evolution from femtoseconds to minutes
    Alvaro, M
    Ferrer, B
    García, H
    Hashimoto, S
    Hiratsuka, M
    Asahi, T
    Masuhara, H
    [J]. CHEMPHYSCHEM, 2004, 5 (07) : 1058 - 1062
  • [2] Laser flash photolysis study of anthracene/viologen charge transfer complex in non-polar, dealuminated zeolites
    Alvaro, M
    Corma, A
    Ferrer, B
    García, H
    Palomares, E
    [J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2004, 6 (06) : 1345 - 1349
  • [3] Synthesis and photochemistry of soluble, pentyl ester-modified single wall carbon nanotube
    Alvaro, M
    Atienzar, P
    de la Cruz, P
    Delgado, JL
    Garcia, H
    Langa, F
    [J]. CHEMICAL PHYSICS LETTERS, 2004, 386 (4-6) : 342 - 345
  • [4] Intrazeolite photochemistry .17. Zeolites as electron donors: Photolysis of methylviologen incorporated within zeolites
    Alvaro, M
    Garcia, H
    Garcia, S
    Marquez, F
    Scaiano, JC
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (16): : 3043 - 3051
  • [5] Comparison between MCM-41 and periodic mesoporous organosilica:: Charge-transfer donor-viologen complexes as probes
    Alvaro, M
    Ferrer, B
    Fornés, V
    García, H
    [J]. CHEMPHYSCHEM, 2003, 4 (06) : 612 - 617
  • [6] A periodic mesoporous organosilica containing electron acceptor viologen units
    Alvaro, M
    Ferrer, B
    Fornés, V
    García, H
    [J]. CHEMICAL COMMUNICATIONS, 2001, (24) : 2546 - 2547
  • [7] First molecular switch encapsulated within the cavities of a zeolite.: A dramatic lifetime increase of the charge-separated state
    Alvaro, M
    Chretien, MN
    Ferrer, B
    Fornés, V
    García, H
    Scaiano, JC
    [J]. CHEMICAL COMMUNICATIONS, 2001, (20) : 2106 - 2107
  • [8] Photochemistry of single wall carbon nanotubes embedded in a mesoporous silica matrix
    Alvaro, M
    Atienzar, P
    Bourdelande, JL
    García, H
    [J]. CHEMICAL COMMUNICATIONS, 2002, (24) : 3004 - 3005
  • [9] [Anonymous], TRENDS INORG CHEM
  • [10] STORAGE OF LIGHT ENERGY BY PHOTOELECTRON TRANSFER ACROSS A SENSITIZED ZEOLITE SOLUTION INTERFACE
    BORJA, M
    DUTTA, PK
    [J]. NATURE, 1993, 362 (6415) : 43 - 45