14967-45-4Relevant articles and documents
A bifunctional probe based on naphthalene derivative for absorbance-ratiometic detection of Ag+ and fluorescence “turn-on” sensing of Zn2+ and its practical application in water samples, walnut and living cells
Li, Na-Na,Bi, Cai-Feng,Zhang, Xia,Xu, Cun-Gang,Fan, Chuan-Bin,Gao, Wei-Song,Zong, Zi-Ao,Zuo, Shan-Shan,Niu, Chuan-Feng,Fan, Yu-Hua
, (2020)
In this work, naphthalene with good biocompatibility was selected, and the probe NBOS was synthesized with 2-Amino-phenol and 2-Amino-benzenethiol. The structure of probe NBOS was confirmed by X-ray Crystallography. Furthermore, the probe showed absorbance-ratiometic sensing for Ag+ over a pH range from 6 to 7.5 and fluorescence “turn on” signal response towards Zn2+ in the pH range of 6–10 in EtOH/H2O (9/1, V/V, pH = 7.4) mixture. The detection limit was obtained to be 4.24 μM for Ag+ and 3.17 nM for Zn2+. Moreover, it could be efficiently recycled by treating Na2EDTA. The sensing mechanism of probe NBOS toward Ag+ and Zn2+ was investigated by FT-IR, HNMR, job'plot and ESI-MS. Typically, the coordination mode of NBOS with Zn2+ was confirmed by DFT calculation. Moreover, probe NBOS was successfully applied in the detection Ag+ and Zn2+ in real water samples. Importantly, probe NBOS could be used to detect Zn2+ in walnut and living cells. Based on the high throughput analysis strategy, absorbance and fluorescence signals of NBOS could be designed as a NOT and OR logic gate controlled by Ag+ (Input 1) and Zn2+ (Input 2).
Palladium catalyzed Csp2-H activation for direct aryl hydroxylation: The unprecedented role of 1,4-dioxane as a source of hydroxyl radicals
Seth, Kapileswar,Nautiyal, Manesh,Purohit, Priyank,Parikh, Naisargee,Chakraborti, Asit K.
, p. 191 - 194 (2015/01/09)
A novel strategy for direct aryl hydroxylation via Pd-catalysed Csp2-H activation through an unprecedented hydroxyl radical transfer from 1,4-dioxane, used as a solvent, is reported with bio relevant and sterically hindered heterocycles and various acyclic functionalities as versatile directing groups.
ESIPT inspired fluorescent 2-(4-benzo[d]oxazol-2-yl)naphtho[1,2-d]oxazol-2- yl)phenol: Experimental and DFT based approach to photophysical properties
Phatangare, Kiran R.,Gupta, Vinod D.,Tathe, Abhinav B.,Padalkar, Vikas S.,Patil, Vikas S.,Ramasami, Ponnadurai,Sekar, Nagaiyan
supporting information, p. 1767 - 1777 (2013/03/14)
ESIPT inspired fluorescent 2-(4-benzo[d]oxazol-2-yl)naphtho[1,2-d]oxazol-2- yl)phenol was synthesized from 1-amino-3-(1,3-benzoxazol-2-yl)naphthalen-2-ol. Photophysical behavior of the synthesized compound was studied using UV-visible and fluorescence spectroscopy in polar and non-polar solvents. The synthesized naphthoxazolyl benzoxazole is fluorescent and very sensitive to the micro-environment. It shows a single absorption and dual emission in non-polar solvents with large Stokes shift originating from Excited State Intramolecular Proton Transfer while in polar solvents only a single short wavelength emission is observed. Experimental absorption and emission wavelengths are in good agreement with those predicted using the Time-Dependent Density Functional Theory (TD-DFT) [B3LYP/6-31G(d)]. The largest wavelength difference between the experimental and computed absorption maxima was 16 nm (acetonitrile) and 7 nm (ethyl acetate, THF, and 1,4-dioxane) in the short and long wavelength regions, respectively. A largest difference of 25 nm was observed for the short wavelength emission in DMF and 22 nm for the longer wavelength emission in chloroform.
