CONTENTS

The progress on design and synthesis of photoactive porphyrins-based dyads, triads and polymers Li Jiang and Yuliang Li* DOI: 10.1142/S1088424607000357 Page: 299-312 Porphyrins are the most frequently employed building blocks as electron donors and sensitizers in artificial photosynthetic models for solar energy conversion. Recently, we have reported a series of covalently linked donor-acceptor dyads, triads and copolymers containing porphyrin analogues aiming to improving the light-harvesting capacity and charge-separation efficiency with potential application in solar cells. In this review, we would like to summarize our recent studies on these photoactive porphyrin-containing composite systems focusing on the designs and properties of these systems based on the intermolecular electro- and energy transfer.
Advances in supramolecularly assembled nanostructures of fullerenes and porphyrins at surfaces Soichiro Yoshimoto* and Kingo Itaya* DOI: 10.1142/S1088424607000369 Page: 313-333 In this minireview, we focus on advances made in the past three years in the field of scanning tunneling microscopy on supramolecular assembly and function of porphyrins, phthalocyanines, and fullerenes, non-covalently bounded on metal single crystal surfaces.
Design and construction of photoinduced electron transfer systems based on [60]fullerene and porphyrin-containing [2]rotaxanes Hisahiro Sasabe and Toshikazu Takata* DOI: 10.1142/S1088424607000370 Page: 334-341 This review explores recent developments of photoinduced electron transfer (PET) systems based on interlocked molecules, especially C60 and porphyrin-containing [2]rotaxanes. A number of synthetic methodologies for the construction of C60-containing interlocked molecules with various photo- and electro-active moieties, in addition to the PET behaviors of these interlocked molecules, are examined. A synthetic strategy for a multistep PET system based on interlocked molecules is also discussed.
Supramolecular photocurrent-generating systems using porphyrin composite materials Toshifumi Konishi*, Masaki Horie, Tatsuo Wada, Shin Ogasawara, Jun-ichi Kikuchi and Atsushi Ikeda* DOI: 10.1142/S1088424607000382 Page: 342-347 Photocurrent-generators constructed of supramolecular mono/multilayer containing porphyrins are reviewed.
Carbon nanotubes and porphyrins: an exciting combination for optoelectronic devices Fernando Langa*, M. José Gómez-Escalonilla and Pilar de la Cruz DOI: 10.1142/S1088424607000394 Page: 348-358 The state of the art between carbon nanotubes and porphyrins is reviewed. Hybrids between carbon nanotubes and porphyrins, either covalently or non-covalently linked, have been the target for numerous groups with the aim of studying their properties.
Syntheses and nonlinear absorption properties of conjugated porphyrin supramolecules Kazuya Ogawa, Chihiro Hara, and Yoshiaki Kobuke* DOI: 10.1142/S1088424607000400 Page: 359-367 Self-assemblies consisting of acetylene-linked bisporphyrins with a 4-nitrophenylethynyl substituent and with a phenylethynyl substituent were synthesized. The maximum effective two-photon absorption cross section values of these compounds were obtained as 1.2 × 105 GM and 8.1 × 104 GM, respectively, at 890 nm.
Photoinduced electron transfer in a supramolecular triad system composed of ferrocene-zinc porphyrin-pyridylnaphthalenediimide Shunichi Fukuzumi* and Yukiyasu Kashiwagi DOI: 10.1142/S1088424607000412 Page: 368-374 A supramolecular ferrocene-zinc porphyrin-pyridylnaphthalenediimide triad is formed by coordinating the pyridine entity of pyridylnaphthalenediimide with the zinc ion of a ferrocene-zinc porphyrin dyad in benzonitrile. The photoexcitation of the triad affords the charge-separated state, ferricenium ion-zinc porphyrin-naphthalenediimide radical anion, which has a long lifetime (320 μs).
Light harvesting porphyrin-crown ether conjugates: toward artificial photosynthetic systems Nathalie Solladié*, Régis Rein and Mathieu Walther DOI: 10.1142/S1088424607000424 Page: 375-382 In this paper we report our ongoing progresses in the preparation of artificial photosynthetic systems through the preparation of light harvesting multi-porphyrins. The synthesis of these antennae is described herein and the energy transfer capabilities of these devices demonstrated. A terminal porphyrin/crown ether conjugate has been maintained in each case to ensure a coordination site for the complexation of an ammonium/C60 derivative, which could be chosen as the electron acceptor partner for the preparation of artificial photosynthetic systems.
Photocurrent generation by benzoporphyrin films prepared by a solution process Hiroko Yamada*, Naoko Kamio, Akihiro Ohishi, Manami Kawano, Tetsuo Okujima and Noboru Ono DOI: 10.1142/S1088424607000436 Page: 383-389 A triple layer structure consisting of tetrabenzoporphyrin; a mixture of tetrabenzoporphyrin and [6,6]-phenyl-C61 butyric acid methyl ester (PCBM); and PCBM films were prepared on ITO electrodes by repeated spin-coating of a soluble precursor of tetrabenzoporphyrin, which can be converted to insoluble tetrabenzoporphyrin by heating, and PCBM. The IPCE values of up to 6.8% was obtained in the presence of hexylviologen as an electron acceptor. Supplementary Material
Pyren-1-ylmethyl N-substituted oxoporphyrinogens Jonathan P. Hill*, Katsuhiko Ariga, Amy Lea Schumacher, Paul A. Karr and Francis D’Souza* DOI: 10.1142/S1088424607000448 Page: 390-396 The synthesiss of 5,10,15,20-tetrakis(3,5-di-tert-butyl-4-oxocyclohexadien-2,5-yl)porphyrinogens alkylated at their macrocyclic nitrogen atoms with pyren-1-ylmethyl groups, and the effect of increasing N-substitution on the spectroscopic and electrochemical properties is reported.

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