Ultrafast electronic, infrared, and X-ray absorption spectroscopy study of Cu(I) phosphine diimine complexes.

Ultrafast electronic, infrared, and X-ray absorption spectroscopy study of Cu(I) phosphine diimine complexes.
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Cu(I) 膦二亚胺络合物的超快电子、红外和 X 射线吸收光谱研究。

DOI:
10.1039/d3fd00027c
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发表时间:
2023
影响因子:
3.4
通讯作者:
Appleby MV
Appleby MV
中科院分区:
化学2区
文献类型:
--
作者:
Appleby MV

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本研究旨在了解瞬时成键在异构性铜(I)双亚胺双膦配合物结构和电子变化之间的相互作用中所起的作用。这是一种新兴的光敏剂,它吸收光谱的红色区域,同时保持足够长的激发态寿命。本文用瞬时吸收光谱(TA)和时间分辨红外光谱(TRIR)研究了这些配合物的动力学,发现它们发生了超快的系间交叉和结构扭曲。影响这些配合物激发态衰变的两种潜在机制包括:由于结构扭曲而使激发态中的铜配位中心开放,以及膦配体的O原子与铜中心的瞬时配位,从而瞬时形成溶剂加合物。已经进行了基电子态的X射线吸收研究,作为即将进行的X射线光谱学研究的先决条件,这将直接确定结构动力学。这些络合物用于双分子应用的潜力被单线态氧的显著产量所证实。
The study aims to understand the role of the transient bonding in the interplay between the structural and electronic changes in heteroleptic Cu(I) diimine diphosphine complexes. This is an emerging class of photosensitisers which absorb in the red region of the spectrum, whilst retaining a sufficiently long excited state lifetime. Here, the dynamics of these complexes are explored by transient absorption (TA) and time-resolved infrared (TRIR) spectroscopy, which reveal ultrafast intersystem crossing and structural distortion occurring. Two potential mechanisms affecting excited state decay in these complexes involve a transient formation of a solvent adduct, made possible by the opening up of the Cu coordination centre in the excited state due to structural distortion, and by a transient coordination of the O-atom of the phosphine ligand to the copper center. X-ray absorption studies of the ground electronic state have been conducted as a prerequisite for the upcoming X-ray spectroscopy studies which will directly determine structural dynamics. The potential for these complexes to be used in bimolecular applications is confirmed by a significant yield of singlet oxygen production.
DOI: 10.1021/jp504294j
发表时间: 2014-11-13
影响因子: 2.9
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发表时间: 2002
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DOI: --
发表时间: 2010
影响因子: 3.3
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DOI: 10.1021/om100106e
发表时间: 2010-05-10
期刊: ORGANOMETALLICS
影响因子: 2.8
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Fulmer, Gregory R.;Miller, Alexander J. M.;Goldberg, Karen I.
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