Three water-soluble fluorophores are synthesized from 1,3,5-tris-(4′-iodophenyl)benzene. The compound with salicylate groups exhibits a selective fluorescent quenching by Cu2+via a static quenching mechanism. The addition of Triton X-100 improves the quantum efficiency of the fluorophore as well as the detection limit for Cu2+ from 6.49 to 0.19 ppb.
Nanosized Molecular Propellers by Cyclodehydrogenation of Polyphenylene Dendrimers
作者:Christopher D. Simpson、Gunter Mattersteig、Kai Martin、Lileta Gherghel、Roland E. Bauer、Hans Joachim Räder、Klaus Müllen
DOI:10.1021/ja036732j
日期:2004.3.1
In a polymer analogous approach, large dendritic oligophenylenes containing benzene and tetraphenylmethane cores are transformed via oxidative cyclodehydrogenation to novel propeller-shaped molecules with large polycyclicaromatichydrocarbon units as "blades". Structure analysis is performed by a combination of MALDI-TOF mass spectrometry, UV/vis, fluorescence, and Raman spectroscopy using solid-state
Reticular Synthesis of tbo Topology Covalent Organic Frameworks
作者:Xing Kang、Xing Han、Chen Yuan、Cheng Cheng、Yan Liu、Yong Cui
DOI:10.1021/jacs.0c06605
日期:2020.9.23
The metal-organicframework (MOF) HKUST-1 with a tbo topology serves as an archetypal tunable and isoreticular framework platform for targeting desired applications, but the design and synthesis of tbo-covalent organic frameworks (COFs) remains a formidable challenge. Here we demonstrate the successful use of reticular chemistry as an appropriate strategy for the design and deliberate construction
We report the synthesis of a novel C3-symmetrical multiphotochromic molecule bearing three azobenzene units at positions 1, 3, 5 of the central phenyl ring. The unique geometrical design of such a rigid scaffold enables the electronic decoupling of the azobenzene moieties to guarantee their simultaneous isomerization. Photoswitching of all azobenzenes in solution was demonstrated by means of UV-vis