pH-Triggered construction of NLO active CMOFs: change in supramolecular assembly, water clusters, helical architectures and their properties

Abstract

Two different chiral metal–organic frameworks (CMOF), namely, {[Cu2(1,10-phen)2(tartrate)H2O]·8H2O}n (1) and {[Cu(1,10-phen)(H2tartrate)H2O]·6H2O}n (2) have been synthesized by alternating the pH of the reaction media.

Strong Intermolecular Exciton Couplings in Solid‐State Circular Dichroism of Aryl Benzyl Sulfoxides

“…Measurement of electronic circular dichroism (ECD, or simply CD) in the solid state 1-3 is acquiring increasing importance because of some intrinsic advantages it offers with respect to its much more popular solution counterpart. The most immediate application of solid-state CD is the study of chiral condensed matter, which includes a variety of different noteworthy materials such as metal organic frameworks (MOF's), [4][5][6][7][8][9] organic gels, [10][11][12][13][14][15][16][17] polymer thin films, [18][19][20] and protein fibrils. [21][22][23] Moreover, chiral crystallization and other chirogenic phenomena occurring exclusively in the crystalline state, which are thought to be ultimately related to the symmetry breaking observed in nature, rely on the measurement of CD and other chiroptical spectroscopies such as circular polarization of luminescence (CPL).…”

Homochiral coordination polymers constructed from aminocarboxylate derivates: Effect of bipyridine on the amidation reaction

“…The white powder was dried under reduced pressure at 50 1C. Yield: 24 g (85.0% .00(C-arom), 129.61 (C-arom), 124.02(C-arom), 59.95(C-alkyl), 50.38(C-alkyl), 30.88 (C-alkyl), 27.79(C-alkyl) ppm.…”

“…Homochiral coordination polymers can be prepared from chiral ligands and templates, which is a most direct and efficient method [24][25][26][27][28]. Despite the fact that hydrothermal techniques have been used widely in preparation of metal organic complexes, most chiral coordination complexes were obtained using conventional solution synthesis techniques, because the chirality may lost under hydrothermal conditions [29][30][31].…”

Structural Diversity of Metallosupramolecular Assemblies Based on the Bent Bridging Ligand 4,4′-Dithiodipyridine

“…Weak antiferromagnetic coupling in XEGHOH has been mentioned. [{Cu(μ-C 7 H 3 NO 4 )(H 2 O)} 2 (μ-dtdp)·CH 3 OH·3H 2 O] n (IMOTAG, C 7 H 3 NO 4 2− = pyridine-2,6-dicarboxylate) is another example of a two-dimensional coordination network with a layer structure ( Figure 36) [103]. Pyridine-2,5-dicarboxylato ligands join Cu(II) ions to form helices along 2 1 screw axes parallel to the [010] direction (space group P2 1 /n).…”