Structure and Solution Equilibrium of N-Salicylidene-amino-sugars and Amino-alcohols.
作者:Shigeharu Inouye
DOI:10.1248/cpb.15.1540
日期:——
The structures and solution equilibria of twenty members of N-salicylidene-amino-sugars and -amino-alcohols were examined mainly in methanol, water and solid state. As the modeled compounds were examined simultaneously three members of N-salicylidene-alkylamines and eight members belonged to the o-methoxybenzylidene, 3-methoxysalicylidene, 3, 5-dibromosalicylidene and 2-hydroxynaphthylidene derivatives. From the comparative studies on the electronic, infrared, NMR spectra and equilibrium position, it was shown that the solution equilibrium consisted of the phenolimine and the ketoamine species, the latter being stabilized by the intra- and intermolecular hydrogen bonding involving the alcoholic hydroxyl groups and protic solvents. The acid-base equilibria of the two tautomers in methanol and the ketoamine-ion-pair equilibrium in water were discussed.
Structurally Characterized Zn2+ Selective Ratiometric Fluorescence Probe in 100 % Water for HeLa Cell Imaging: Experimental and Computational Studies
作者:Babli Kumari、Sisir Lohar、Milan Ghosh、Sabyasachi Ta、Archya Sengupta、Prajna Paramita Banerjee、Ansuman Chattopadhyay、Debasis Das
DOI:10.1007/s10895-015-1688-9
日期:2016.1
Fluorescence recognition of Zn2+ in 100 % aqueous medium using 2-((1, 3 dihydroxy-2-(hydroxymethyl)propan-2 ylimino) methyl) phenol (SALTM) as ratiometric probe is reported. Moreover, SALTM can discriminate Zn2+ from Cd2+ very effectively. The binding constant and detection limit of the probe for Zn2+ is 2.2 × 104 M-1/2 and 2.79 × 10−8 M respectively. Interestingly, corresponding naphthalene derivative (HNTM) having less water solubility fails to be a ratiometric sensor. SALTM can detect intracellular Zn2+ in HeLa cervical cancer cells under fluorescence microscope. Moreover, DFT and TD-DFT studies support experimental findings.
Two new and interesting tetranuclear Tb(III)-based clusters [Tb4(NO3)2(acac)4(HL)2(CH3OH)2]·2(CH3CN)] (1) and [Tb4(NO3)2(acac)4(L)2(CH3CH2OH)2] (2) (H4L1 = 2-(hydroxymethyl)-2-(((2-hydroxynaphthalen-1-yl)methylene)amino)propane-1,3-diol); H3L2 = 2-(((2-hydroxynaphthalen-1-yl)methylene)amino)-2-methylpropane-1,3-diol; and Hacac = acetylacetone) have been successfully synthesized by using two polydentate
Rao, Chebrolu P.; Sreedhara, Alavattam; Rao, P. Venkateswara, Journal of the Chemical Society, Dalton Transactions, 1998, # 14, p. 2383 - 2393
作者:Rao, Chebrolu P.、Sreedhara, Alavattam、Rao, P. Venkateswara、Verghese, M. Bindu、Rissanen, Kari、Kolehmainen, Erkki、Lokanath、Sridhar、Prasad, J. Sashidhara