Reference

Structural basis for vapoluminescent organoplatinum materials derived from noncovalent interactions as recognition components

Structural basis for vapoluminescent organoplatinum materials derived from noncovalent interactions as recognition components. Lu, Wei; Chan, Michael C. W.In this study， 108-88-3 and 2510-22-7 are also used.; Zhu, Nianyong; Che, Chi-ming; He, Zhike; Wong, Kwok-yin (Department of Chemistry and Open Laboratory of Chemical Biology of the Institute of Molecular Technology for Drug Discovery and Synthesis, The University of Hong Kong, Hong Kong, Peop. Rep. China). Chemistry--A European Journal, 9(24), 6155-6166 (English) 2003 Wiley-VCH Verlag GmbH & Co. KGaA. CODEN: CEUJED. ISSN: 0947-6539. DOCUMENT TYPE: Journal CA Section: 80 (Organic Analytical Chemistry) The spectroscopic properties and crystal structures of platinum(II) complexes bearing functionalized s-alkynyl groups, [(tBu2bpy)Pt(CoCAr)2] (tBu2bpy = 4,4'-bis-tert-butyl-2,2'-bipyridine, Ar = 4-pyridyl, 1; 3-pyridyl, 2; 2-pyridyl, 3; 4-ethynylpyridyl, 4; 2-thienyl, 5; pentafluorophenyl, 6) were studied. Solid-state emissions of 1 and 6 are dependent on their crystallinity. Reversible and selective vapoluminescence was obsd. for 1 and 6 in the presence of chlorocarbon vapors. For solid 1, dramatic enhancement of green luminescence is obsd. upon sorption of CH2Cl2 or CHCl3 vapor. The excimeric orange emission for solid 6 is switched to monomeric green emission upon exposure to CH2Cl2 vapor. The luminescent responses of a thin film of 1 towards various org. vapors also were examd. In the crystallog. detd. structure of 1×CH2Cl2, the bis(acetylide) moiety acts as the receptor berth for a CH2Cl2 mol. through concerted C-H×××p(CoC) interactions, while Cl×××Cl interactions connect the CH2Cl2 mols. into infinite linear chains. The obsd. crystal lattices are arranged into scaffolds of varying porosity by weak C-H×××N(py) (1×CH2Cl2, 1×CH3CN, 4×DMF) and C-H×××F-C (6, 6×CH3CN) interactions. The correlation between the crystal structures of 1×CH2Cl2, 1×CH3CN, 2, 4×DMF, 5, 6, and 6×CH3CN and their vapoluminescence suggests that weak nonconventional hydrogen-bonding interactions preside over the reversible sensing and signalling processes. .

Syntheses of Hexakis(4-functionalized-phenyl)benzenes and Hexakis[4-(4'-functionalized- phenylethynyl)phenyl]benzenes Directed to Host Molecules for Guest-Inclusion Networks

Syntheses of Hexakis(4-functionalized-phenyl)benzenes and Hexakis[4-(4'-functionalized- phenylethynyl)phenyl]benzenes Directed to Host Molecules for Guest-Inclusion Networks. Kobayashi, Kenji; Kobayashi, Norifumi; Ikuta, Masahiro; Therrien, Bruno; Sakamoto, Shigeru; Yamaguchi, Kentaro (Department of Chemistry, Faculty of Science, Shizuoka University, Shizuoka 422-8529, Japan). Journal of Organic Chemistry, 70(2), 749-752 (English) 2005 American Chemical Society. CODEN: JOCEAH. ISSN: 0022-3263. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Section cross-reference(s): 75 The syntheses of various types of hexakis(4-functionalized-phenyl)benzenes I [R = CN, iodo, H2N, B(OH)2, n-C7H15CONH, n-C8H17NHCONH] and hexakis[4-(4'-functionalized-phenylethynyl)phenyl]benzenes I (R = 4-NCC6H4CYC, 4-pyridylethynyl, 4-HOC6H4CYC, etc.) by cobalt-catalyzed cyclotrimerization of diarylacetylenes and by Sonogashira coupling reaction of I (R = iodo) with arylacetylenes, resp., are described. 2510-22-7 is also in the experiment. X-ray crystallog. anal. showed that host I (R = iodo) or I (R = 4-HO2CC6H4CYC) forms a 2-D network by unique I×××I or CH×××O:C interactions, resp. .