Structural and spectroscopic studies of 2,9-dimethyl-1,10-phenanthrolinium cation (DPH) with chloride, triflate and gold dicyanide anions. The role of H-bonding in Molecular recognition and enhancement of - stacking

Abstract

The crystal structures of the pronated ligand, 2,9-dimethyl-1,10-phenanthrolinium (DPH) cation with selected counter anions (chloride (1), triflate (2), and gold dicyanide (3)) are reported. The role of a hydrogen bond interaction in influencing the solid state - stacking found in all three compounds has been investigated. In the chloride, and triflate adducts 1 and 2, respectively, the solid state morphology was stabilized by additional Hbonding interaction. In particular, compound 1 displays extensive network of H-bonding interaction where  stacked layers are interlinked through the H-bonding network. In compound 2, the H-bonding interaction is less pronounced and involves mainly the non-coordinating triflate anion and the protonated N atom of the cation connecting neighboring intra-layer molecules. In 3 a weaker interaction exists between the N atom of the Au(CN)2anion and the protonated N of the ligand, but the system lacks extensive intra-or inter-layer H-bonding interaction that connects the neighboring molecules.

A microporous metal–organic framework with open metal sites for selective sensing Fe3+, CrO42- and nitrobenzene

“…Moreover, 1 has five potential sensing sites and its sensing properties were not explored at all. Our group has also reported several interesting solventinduced MOFs in recent works [15][16][17][18][19], and the results indicate that sensing feature are mainly controlled by solvent size and polarity, however, the mechanisms of solvent effects are still largely unexplored. Consequently, much research work in this area remains to be done [20].…”

Structural and spectroscopic characterization and DFT studies of 2-amino-1,10-phenanthrolin-1-ium chloride

“…The amino group is generally considered as electrondonating substituent in aromatic ring system and the amino group involved in H-bonding leads to a reduction in the stretching wavenumber, an increase in the N-H2 bending wavenumber, and an increase in infrared intensity. The observation of a broad band at 3459 cm -1 , at higher wavenumber compared that of 3320 cm -1 observed for the nonprotonated counterpart [21], assigned to N-H2 stretching the primary amine having second band at lower wavenumber at 2852 cm -1 is evident to H-bonding with chloride anion [66]. These bands were calculated at 3503 and 2615 cm -1 , respectively.…”

Effect of synthesized temperature on the assembly and properties of four lanthanide supramolecular frameworks

“…This phenomenon operates when the LUMO of 4 is at higher energy level than that of the LUMOs of acceptor analytes. A simple schematic illustration of the electron transfer process was listed in Scheme 1 [24][25].…”