一种在室温下溶液中具有长寿命激发态的三金属混合钌（II）/铁（II）三联吡啶配合物。

A trimetallic mixed Ru(II)/Fe(II) terpyridyl complex with a long-lived excited state in solution at room temperature.

作者信息

Baitalik Sujoy, Wang Xian-yong, Schmehl Russell H

机构信息

Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.

出版信息

J Am Chem Soc. 2004 Dec 22;126(50):16304-5. doi: 10.1021/ja044561s.

DOI:10.1021/ja044561s

PMID:15600315

Abstract

The photophysical behavior of a series of mono- and trimetallic Ru(II) and mixed Ru(II)/Fe(II) bis-terpyridyl complexes was examined. The complexes have bridging terpyridyl ligands linked by phenylene-vinylene substituents on the terpyridyl. For the complexes bridged by a single phenylene-vinylene, the lowest-energy excited state is metal-to-ligand charge transfer (MLCT), and excited-state decay is on the 1-10 ns time scale. The complexes with two phenylene-vinylene groups have thermally equilibrated excited states that are localized on the phenylene-vinylene bridge and have much longer lifetimes (>200 ns). Remarkably, the trimetallic complex having an Fe(II) terpyridyl center also has a long-lived excited state, despite the fact that low-energy iron-localized excited states exist on the complex.

摘要

研究了一系列单金属和三金属钌（II）以及混合钌（II）/铁（II）双吡啶配合物的光物理行为。这些配合物具有通过吡啶基上的亚苯基 - 亚乙烯基取代基连接的桥连吡啶基配体。对于由单个亚苯基 - 亚乙烯基桥连的配合物，能量最低的激发态是金属到配体的电荷转移（MLCT），激发态衰减时间在1 - 10纳秒范围内。具有两个亚苯基 - 亚乙烯基基团的配合物具有热平衡的激发态，该激发态定域在亚苯基 - 亚乙烯基桥上，并且具有长得多的寿命（>200纳秒）。值得注意的是，具有铁（II）吡啶基中心的三金属配合物也具有长寿命的激发态，尽管该配合物上存在低能量的铁定域激发态。