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A series of new cadmium complexes (dyes1–5) were obtained by assembly of the donor–bridge–acceptor (D–π–A)-type ligand (L: 4′-(4-[4-(imidazole)styryl]phenyl) 2,2′ : 6′,2″-terpyridine) with CdX2(X=Cl, Br, I, NCS, ClO4), in which dye3was characterized by single crystal X-ray diffraction. Various weak interactions, including hydrogen bonds (C–H⋯N, C–H⋯X) and π–π interactions, played significant roles in the final topological structures. Linear and non-linear optical properties of ligand and the complexes were investigated. The two-photon absorption cross-section of these complexes are larger than that of ligand with maximum values of 577 GM (dye1), 242 GM (dye2), 171 GM (dye3), 326 GM (dye4), and 215 GM (dye5) in N,N-dimethylformamide. [ABSTRACT FROM AUTHOR]

Ultraviolet-visible (UV-vis) spectra, fluorescence spectra, electrochemistry, and the thermodynamic method were used to discuss the interaction mode between the inclusion complex of hematoxylin with β-cyclodextrin and herring sperm DNA. On the condition of physiological pH, the result showed that hematoxylin and β-cyclodextrin formed an inclusion complex with binding ratio nhematoxylin:nβ-cyclodextrin = 1:1. The interaction mode between β-cyclodextrin-hematoxylin and DNA was a mixed binding, which contained intercalation and electrostatic mode. The binding ratio between β-cyclodextrin-hematoxylin and DNA was nβ-cyclodextrin -hematoxylin:nDNA = 2:1, binding constant was K⊖298.15K = 5.29 × 104 L·mol-1, and entropy worked as driven force in this action. [ABSTRACT FROM AUTHOR]