Title

Cobaltacarborane-phthalocyanine conjugates: Syntheses and photophysical properties

Document Type

Article

Publication Date

5-1-2009

Abstract

Syntheses of two new cobaltacarborane-phthalocyanine conjugates, one anionic (Pc 6) and one zwitterionic (Pc 7), were accomplished via cyclotetramerization of the corresponding cobaltacarborane-substituted phthalonitriles (4 or 5) with excess phthalonitrile in quinoline. X-ray structures of two phthalonitrile precursors (2 and 3) were obtained and are discussed, and the absorption and emission properties of the two cobaltacarborane-phthalocyanine conjugates in several solvents were investigated. The anionic conjugate 6 exists mainly as a monomer in polar organic solvents and has fluorescence quantum yields in the region 0.2-0.3. The zwitterionic conjugate 7 aggregates in solution and displays lower quantum yields ∼0.1 in organic solvents. © 2008 Elsevier B.V. All rights reserved.

Publication Source (Journal or Book title)

Journal of Organometallic Chemistry

First Page

1607

Last Page

1611

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