Fabrication of Various Ordered Films of Oxotitanium(IV) Phthalocyanine by Vacuum Deposition and Their Spectroscopic Behavior
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- 作者：Hisatomo Yonehara ; Hideki Etori ; M. K. Engel ; Minoru Tsushima ; Noriaki Ikeda ; Takeshi Ohno ; and Chyongjin Pac
- 刊名：Chemistry of Materials
- 出版年：2001
- 出版时间：March 2001
- 年：2001
- 卷：13
- 期：3
- 页码：1015 - 1022
- 全文大小：176K
- 年卷期：v.13,no.3(March 2001)
- ISSN：1520-5002
文摘
Different types of ordered solid films of oxotitanium(IV) phthalocyanine (OTiPc) were grownin 50-500 nm thickness by vacuum deposition onto such conventional substrates as metal-and ITO-coated glass and neat glass at a rate of ~0.05 nm s-1. Under 10-3-10-4 Pa isotropicfilms with short-range molecular organization and preferential molecular orientation weregrown on the substrates kept at ~25 
C but ordered 
(phase II) or 
(phase I) crystal filmson the substrates heated at 150 C. The deposition onto surface-oxidized Al, Ti, and Cu/glass, ITO/glass, and neat glass at ~25 or 150 C selectively gave ordered isotropic or -crystalfilms which have preferential molecular alignments with "standing" orientations of themolecular plane with respect to the substrate surface. On the other hand, another type ofordered isotropic or -crystal films with preferential "lying" molecular orientations was formedby the deposition onto Au, Ag, and unoxidized Cu on glass at ~25 or 150 C. In the case of150 C-heated Pt/glass, the -crystal film with "standing" molecular orientations was grownunder 10-3-10-4 Pa, but another type of -crystal film with "lying" orientations under 2.7× 10-5 Pa. Scanning electron microscopic observations of the ordered crystalline filmsindicated that single-crystal-like domains are grown from the bottom to the top of the filmand are densely packed to give monolithic morphologies with little grain boundary. Visible-near-IR absorption and fluorescence spectra of the ordered solid films were recorded, showingunique dependences on the molecular alignments involving anisotropic behavior in thepolarized absorption spectra of the -crystal films with different molecular alignments.
C but ordered (phase II) or (phase I) crystal filmson the substrates heated at 150 C. The deposition onto surface-oxidized Al, Ti, and Cu/glass, ITO/glass, and neat glass at ~25 or 150 C selectively gave ordered isotropic or -crystalfilms which have preferential molecular alignments with "standing" orientations of themolecular plane with respect to the substrate surface. On the other hand, another type ofordered isotropic or -crystal films with preferential "lying" molecular orientations was formedby the deposition onto Au, Ag, and unoxidized Cu on glass at ~25 or 150 C. In the case of150 C-heated Pt/glass, the -crystal film with "standing" molecular orientations was grownunder 10-3-10-4 Pa, but another type of -crystal film with "lying" orientations under 2.7× 10-5 Pa. Scanning electron microscopic observations of the ordered crystalline filmsindicated that single-crystal-like domains are grown from the bottom to the top of the filmand are densely packed to give monolithic morphologies with little grain boundary. Visible-near-IR absorption and fluorescence spectra of the ordered solid films were recorded, showingunique dependences on the molecular alignments involving anisotropic behavior in thepolarized absorption spectra of the -crystal films with different molecular alignments.