SYSTEMATIC STUDY OF A SERIES OF HIGHLY FLUORESCENT ROD-SHAPED DONOR-ACCEPTOR SYSTEMS
SYSTEMATIC STUDY OF A SERIES OF HIGHLY FLUORESCENT ROD-SHAPED DONOR-ACCEPTOR SYSTEMS
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DOI：
10.1021/ja00159a050
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发表时间：
1990-01-31
影响因子：
15
通讯作者：
VERHOEVEN, JW
中科院分区：
文献类型：
--
作者：
HERMANT, RM;BAKKER, NAC;VERHOEVEN, JW
报道了双色发光分子1-11的合成和发光性质。所有体系都含有作为单电子供体（D）的苯胺基和作为电子受体（A）的各种取代的乙烯部分，所述取代的乙烯部分被由哌啶环提供的棒状脂环族骨架分开。从theemission性质可以得出结论，在这些分子中，D和A之间的电子耦合是足够的，以允许在激发时完全的电荷转移（如果物理上可行）。偶极电荷转移（CT）激发态，从而填充显示出非常强的荧光，这是高度溶剂化变色（即，经历一个大的波长偏移，响应于溶剂极性的变化），使这些系统的利益作为一类新的荧光探针。Variationof受体基团被发现允许设计这样的探针，与量子产率与溶剂极性配置文件优化任何particularpolarity范围。
The synthesis and emissive properties of bichromophoric molecules 1-11 are reported. All systems contain an anilino group as a one-electron donor (D) and various substituted ethylene moieties as electron acceptor (A) separated by a rod-shaped alicyclic framework provided by a piperidine ring. From theemissive properties it is concluded that in these molecules the electronic coupling between D and A is sufficient to allow complete charge transfer upon excitation (if thermodynamically feasible). The dipolar charge-transfer (CT) excited state thus populated displays a very strong fluorescence, which is highly solvatochromic (ie, undergoes a large wavelength shift in response to changes of the solvent polarity), making these systems of interest as a new class of fluorescent probes. Variationof the acceptor group is found to allow design of such probes, with quantum yield vs solvent polarity profiles optimized for any particularpolarity range.