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首页> 外文期刊>Chemistry: A European journal >Guest-Driven Luminescence: Lanthanide-Based Host–Guest Systems withBimodal Emissive Properties Based on a Guest-Driven Approach
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Guest-Driven Luminescence: Lanthanide-Based Host–Guest Systems withBimodal Emissive Properties Based on a Guest-Driven Approach

机译：来宾驱动的发光：基于来宾驱动方法的基于镧系元素的具有双峰发射特性的主机系统

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摘要

A series of discrete closed,semi-closed, and polymeric lanthanide-based [{Ln(H_20)_8}~3+cLn~III_2L_4]host–guest systems with tetragonal prism-like structure have been designed andsynthesized through the ligand-domi-nated approach. These nanoscopiccages are robust and can be maintainedupon guest exchange. Within the re-stricting space, the luminescence inten-sity of the encapsulated [Ln(H_20)_8]~3+species is dramatically enhanced due tothe vibrational movements originating from the O–H oscillators in the coordi-nated water molecules being effectivelyreduced by the host–guest H-bondinginteractions. Based on the guest-drivenapproach, tunable emission and bimo-dal emission (UV/Vis/NIR) of these[{Ln(H_20)_8}~3+cLn~III_2L_4]supramolec-ular systems are successfully realized.Moreover, the strong luminescenceoriginating from [{Ln(H_2O)_8}~3+cLn~III_2L_4] host–guest system can bequenched by encapsulation of d-blockmetal quenchers, such as Fe~3+andCu~2+, through solid-state f–d metal ex-change. Additionally, this study demon-strates that the photoinduced solid-state guest-independent emission spec-trum could be one of the most diagnos-tic techniques for monitoring the solid-state guest-exchange process.
机译：设计并合成了一系列基于四方棱柱状结构的离散，半封闭和聚合物镧系元素的[{Ln（H_20）_8}〜3 + cLn〜III_2L_4]主客体系统，并通过配体-domi-固定方法。这些纳米镜笼坚固耐用，可以在客人交换时进行维护。在限制空间内，被包封的[Ln（H_20）_8]〜3 +物种的发光强度显着增强，这是因为通过有效地降低了配位水分子中OH振荡器产生的振动运动主客体之间的H键相互作用。基于客体驱动的方法，成功实现了这些[{Ln（H_20）_8}〜3 + cLn〜III_2L_4]超分子系统的可调谐发射和双分子发射（UV / Vis / NIR）。 [{Ln（H_2O）_8}〜3 + cLn〜III_2L_4]主体-客体系统产生的发光可以通过固态f–d金属封装d-blockmetal淬灭剂（例如Fe〜3 +和Cu〜2 +）来淬灭交换。此外，这项研究表明，光诱导的固态客体无关的发射光谱可能是监测固态客体交换过程的最诊断技术之一。

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