361543-99-9Relevant articles and documents
Trigonal rigid triphenols: Self-assembly and multicomponent lattice inclusion
Moorthy, Jarugu Narasimha,Natarajan, Palani,Bajpai, Alankriti,Venugopalan, Paloth
scheme or table, p. 3406 - 3417 (2012/04/04)
The sterics introduced via methyl groups impart rigidity and inclusion behavior to trigonal C3-symmetric triphenol hosts H1-H4. Triphenol H1 is found to mimic the O-H...O hydrogen-bonded self-assembly of trimesic acid to yield porous honeycomb nets. It is found that 18-crown-6?H1 in turn binds guest molecules in the hexagonal voids to yield guest?guest?host multicomponent molecular crystals. The triphenol H2 and the homologous derivatives H3 and H4 are also found to crystallize with 18-crown-6 and other guests to yield multicomponent crystals, but in these cases the 18-crown-6 is found to serve as a spacer. While the structure of H2 is determined in its guest-free form, some of the inclusion compounds of triphenols lend themselves to crystal packings that are deciphered based on network topologies. The networks observed for H1-Tol and H3-C-B-Et are unique; in the latter, the crystal packing analysis reveals organization of molecules into a pattern that is reminiscent of borromean rings.
Syntheses of extreme sterically hindered 4-methoxyboronic acids
Diemer, Vincent,Chaumeil, Hélène,Defoin, Albert,Carré, Christiane
experimental part, p. 918 - 929 (2010/03/25)
4-Iodoanisoles 3a,b, 3d and 4-bromoanisoles 4a-d were readily obtained. An extreme steric hindrance precluded obtaining 3c. Catalytic borylation of 3a,b, 3d followed by hydrolysis of boronic ester 26a,b, 26d easily provided the boronic acids 5a,b, 5d. Com
Ultralarge hyperpolarizability twisted π-electron system electro-optic chromophores: Synthesis, solid-state and solution-phase structural characteristics, electronic structures, linear and nonlinear optical properties, and computational studies
Kang, Hu,Facchetti, Antonio,Jiang, Hua,Cariati, Elena,Righetto, Stefania,Ugo, Renato,Zuccaccia, Cristiano,Macchioni, Alceo,Stern, Charlotte L.,Liu, Zhifu,Ho, Seng-Tiong,Brown, Eric C.,Ratner, Mark A.,Marks, Tobin J.
, p. 3267 - 3286 (2008/02/01)
This contribution details the synthesis and chemical/physical characterization of a series of unconventional twisted π-electron system electro-optic (EO) chromophores. Crystallographic analysis of these chromophores reveals large ring-ring dihedral twist