Molecular interactions of monosulfonate tetraphenylporphyrin (TPPS1) and meso-tetra(4-sulfonatophenyl)porphyrin (TPPS) with dimethyl methylphosphonate (DMMP)

Single-walled carbon nanotube/cobalt phthalocyanine derivative hybrid material: preparation, characterization and its gas sensing properties

“…163 cm À1 ) could be ascribed to a distribution of diameters in the SWNT samples. 38 As shown in the inset spectrum in Fig. 3a, two bands for the RBM of SWNTs can be observed at 149 cm À1 and 163 cm À1 , from which we can conclude that most of the SWNTs we used belong to the semi-conducting SWNTs.…”

DNA intercalative 4-butylaminopyrimido[4′,5′:4,5]thieno(2,3-b)quinoline induces cell cycle arrest and apoptosis in leukemia cells

“…BPTQ solutions with or without DNA were excited at 288 nm, and fluorescence intensities were monitored at 446 nm. The association constants and stoichiometries of the hydrogen-bonding interactions in the BPTQ-DNA systems were determined by plotting double reciprocal plot of the change in absorbance or fluorescence of BPTQ as a function of DNA concentration by the method of Benesi and Hildebrand [22,23].…”

“…These spectral characteristics may suggest a binding mode, involving intercalative interaction between the drug chromophore and the DNA base pairs. The 1:1 and 1:2 Benesi-Hildebrand methods were used to investigate the association constants and stoichiometries of the interactions in the two systems[22,23]. 1:1 and 1:2 (SeeSupplementary Material, Fig.…”

Syn–anti conformational switching: Synthesis and X-ray structures of tweezer and anti form in a zinc porphyrin dimer induced by axial ligands

“…Binding constants (K) were determined (Fig. 11) by nonlinear curve fitting of absorbance at 424 nm for single step 1:2 complexation by using Benesi-Hildebrand equation [42] and the values are 48 M À2 and 41 M À2 , respectively for PDAB and CNPY ligands.…”