A Self-Assembled Unit Comprising 12 Squaraine Dyes Built Up from Two Star-Shaped Hexasquarainyl-Benzene Molecules.
A Self-Assembled Unit Comprising 12 Squaraine Dyes Built Up from Two Star-Shaped Hexasquarainyl-Benzene Molecules.
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由 12 种方酸菁染料组成的自组装单元,由两个星形六方酸菁基苯分子构成
DOI:
10.1002/chem.201805685
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
C. Lambert
中科院分区:
文献类型:
--
作者:
M. H. Schreck;M. I. S. Röhr;T. Clark;V. Stepanenko;F. Würthner;C. Lambert
We describe the aggregate formation and optical properties of a star‐shaped hexaarylbenzene with six squaraine chromophores (=hexasquarainyl benzene). Comprehensive concentration‐dependence studies in acetone/CHCl3mixtures reveal a strong propensity to form discrete dimeric aggregates with a high binding constant in excess of 106m−1. In this context, a large hypsochromic shift of almost 2700 cm−1was found in the absorption spectrum, indicating H‐type exciton coupling. The aggregate band is characterised by a very small band width of only 560 cm−1, probably caused by exchange narrowing. Both experimental and computational methods were used to elucidate the supramolecular aggregate structure, which is assumed to consist of two stacked hexasquarainyl benzene monomers.
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DOI:
10.1016/s0301-0104(02)00384-1
发表时间:
2002-06
期刊:
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
影响因子:
--
作者:
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通讯作者:
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影响因子:
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作者:
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