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首页> 外文期刊>Chemistry: A European journal >Sensitised Ln(III) Emission and Excited-State Dynamics of Cofacial 'Pacman' Porphyrin Terpyridine Complexes
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Sensitised Ln(III) Emission and Excited-State Dynamics of Cofacial 'Pacman' Porphyrin Terpyridine Complexes

机译：界面“ Pacman”卟啉三联吡啶配合物的敏化Ln（III）发射和激发态动力学

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摘要

An asymmetric 'Pacman' metalloligand, [Zn(PXT)], which features a cofacial Zn-II-porphyrin unit (P) covalently attached to a terpyridine (T) chelating group via a rigid xanthene (X) moiety has been prepared, and its interactions with several different trivalent Ln(III) cations (Nd-III, Gd-III, Yb-III and Lu-III) have been examined. The formation of 1:1 metal-ligand complexes was monitored by H-1 NMR spectroscopy and corroborated by HRMS data. Solution-stability constants were determined by UV/Vis titration, and the resulting complexes with Nd-III or Yb-III demonstrated sensitised emission in the NIR region due to energy transfer from the Zn-II-porphyrin donor to Ln(III) acceptor. The energy transfer was investigated by transient absorption techniques, which provided insight into the kinetics and efficiency of the antenna effect.
机译：制备了不对称的“ Pacman”金属配体[Zn（PXT）]，其特征是通过刚性x吨（X）部分共价连接至三联吡啶（T）螯合基团的表面Zn-II-卟啉单元（P），并且研究了它与几种不同的三价Ln（III）阳离子（Nd-III，Gd-III，Yb-III和Lu-III）的相互作用。通过H-1 NMR光谱监测1：1金属-配体络合物的形成，并通过HRMS数据证实。通过UV / Vis滴定确定溶液稳定性常数，由于从Zn-II-卟啉供体到Ln（III）受体的能量转移，所得的Nd-III或Yb-III配合物在NIR区域表现出敏化发射。通过瞬态吸收技术研究了能量转移，该技术提供了对天线效应的动力学和效率的深入了解。

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