Extending the Bandwidth of Reverse Saturable Absorption in Platinum Complexes Using Two-Photon-Initiated Excited-State Absorption

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• 作者：Bingguang Zhang ; Yunjing Li ; Rui Liu ; Timothy M. Pritchett ; Joy E. Haley ; Wenfang Sun
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：February 13, 2013
• 年：2013
• 卷：5
• 期：3
• 页码：565-572
• 全文大小：430K
• 年卷期：v.5,no.3(February 13, 2013)
• ISSN：1944-8252

文摘

Pt(II) complexes bearing 4-(7-(benzothiazol-2鈥?yl)-9,9-diethylfluoren-2-yl)-2,2鈥?6鈥?2鈥?terpyridine or 4-(7-(benzothiazol-2鈥?yl)-9,9-diethylfluoren-2-yl)ethynyl-2,2鈥?6鈥?2鈥?terpyridine ligand exhibit strong reverse saturable absorption in the visible spectral region and large two-photon initiated excited-state absorption in the near-IR region. They are promising broadband nonlinear absorbing materials from the visible to the near-IR region. The extended 蟺-conjugation in complex 2 that has a C鈮 linker between the terpyridine ligand and the 4-(7-(benzothiazol-2鈥?yl)-9,9-diethylfluoren-2-yl) substituent significantly increases the two-photon absorption cross sections (蟽₂), making it among the strongest of two-photon absorbing Pt(II) complexes.

Keywords:

platinum(II) terpyridine complex; photophysics; excited-state absorption; two-photon absorption; reverse saturable absorption; nonlinear absorbing materials