Search results for: Pinggui Yi

Items from 1 to 20 out of 49 results

article

Theoretical studies of π-electron delocalization and localization on intramolecular proton transfer in the ground state

Hongliang Peng, Pengru Huang, Pinggui Yi, Fen Xu, more

Journal of Molecular Structure > 2018 > 1154 > C > 590-595

Proton transfer processes of 15 benzimidazole compounds are studied by density functional theory methods, and natural orbital energy index (NOEI) is introduced. Here, NOEI and nucleus independent chemical shift (NICS) are applied to estimate the π-electron localization and delocalization, respectively. Proton transfer potential energy surfaces are calculated to explore these processes, and the results...

article

Two-photon fluorescent probe for lysosome-targetable hypochlorous acid detection within living cells

Peisheng Zhang, Hong Wang, Di Zhang, Xuyao Zeng, more

Sensors and Actuators B: Chemical > 2018 > 255 > P2 > 2223-2231

The design of robust tools for hypochlorous acid (HClO) detection at subcellular level is highly desired for the better understanding of its biological function in cellular signaling pathways. Herein, we report the development of a two-photon fluorescent probe (TPFP) for lysosome-targetable HClO detection through the integration of a lysosome-targetable group (aminoethyl)morpholine, two-photon fluorophore...

article

A silica nanoparticle-based dual-responsive ratiometric probe for visualizing hypochlorite and temperature with distinct fluorescence signals

Jian Chen, Chonghua Zhang, Kun Lv, Hong Wang, more

Sensors and Actuators B: Chemical > 2017 > 251 > C > 533-541

Hypochlorite (ClO⁻) and temperature play crucial roles in a wide range of physiological processes, and they are also implicated in various diseases, including cancer, inflammation of tissues and so on. Therefore, it is of great importance to explore a novel method to detect ClO⁻ and temperature instantly. In this study, we developed a silica nanoparticle-based dual-responsive ratiometric fluorescent...

article

Pyridine‐Fused Bis(Norcorrole) through Hantzsch‐Type Cyclization: Enhancement of Antiaromaticity by an Aromatic Bridge

Xiaofang Li, Yankui Meng, Pinggui Yi, Marcin Stępień, more

Angewandte Chemie International Edition > 56 > 36 > 10810 - 10814

A non‐catalytic condensation of Ni^II β‐aminonorcorrole with aryl aldehydes is shown to produce a family of pyrromethane dimers that undergo deaminative cyclization to yield pyridine‐fused bis(norcorrole)s comprising two antiaromatic macrocycles communicating by an aromatic moiety. The new compounds were characterized by spectroscopic, structural, and electrochemical methods supported by DFT calculations,...

article

Pyridine‐Fused Bis(Norcorrole) through Hantzsch‐Type Cyclization: Enhancement of Antiaromaticity by an Aromatic Bridge

Xiaofang Li, Yankui Meng, Pinggui Yi, Marcin Stępień, more

Angewandte Chemie > 129 > 36 > 10950 - 10954

article

One-pot fabrication of FRET-based fluorescent probe for detecting copper ion and sulfide anion in 100% aqueous media

Kun Lv, Jian Chen, Hong Wang, Peisheng Zhang, more

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2017 > 177 > C > 63-68

The design of effective tools for detecting copper ion (Cu²⁺) and sulfide anion (S²⁻) is of great importance due to the abnormal level of Cu²⁺ and S²⁻ has been associated with an increase in risk of many diseases. Herein, we report on the fabrication of fluorescence resonance energy transfer (FRET) based fluorescent probe PF (PEI-FITC) for detecting Cu²⁺ and S²⁻ in 100% aqueous media via a facile...

article

Polymer nanoparticle-based ratiometric fluorescent probe for imaging Hg2+ ions in living cells

Hong Wang, Peisheng Zhang, Jian Chen, Ya Li, more

Sensors and Actuators B: Chemical > 2017 > 242 > C > 818-824

Mercury pollutant brings huge threat to human health and the environment because of its bioaccumulation and permanent damage. Thus, highly selective and ratiometric detection and imaging of Hg²⁺ in organisms is quite important. Herein, we report on a polymer nanoparticle-based ratiometric fluorescent probe (NP3) for highly selective recognition of Hg²⁺ in totally aqueous solution and imaging in living...

article

Cyclam-functionalized carbon dots sensor for sensitive and selective detection of copper(II) ion and sulfide anion in aqueous media and its imaging in live cells

Jian Chen, Ya Li, Kun Lv, Weibang Zhong, more

Sensors and Actuators B: Chemical > 2016 > 224 > C > 298-306

The detection of copper ion (Cu²⁺) and sulfide anion (S²⁻) is of vital importance since the abnormal level of Cu²⁺ or S²⁻ can lead to many diseases. Herein, a highly sensitive and selective fluorescent sensor, 1,4,8,11-tetraazacyclotetradecane (Cyclam)-functionalized carbon dots (CCDs), has been designed, synthesized and evaluated for Cu²⁺ and S²⁻. For this nanoprobe, a specific fluorescence resonance...

article

Study on the interaction between Besifloxacin and bovine serum albumin by spectroscopic techniques

Xianyong Yu, Bingfei Jiang, Zhixi Liao, Yue Jiao, more

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2015 > 149 > Complete > 116-121

The interaction between Besifloxacin (BFLX) and bovine serum albumin (BSA) was investigated by spectroscopic (fluorescence, UV–Vis absorption and circular dichroism) techniques under imitated physiological conditions. The experiments were conducted at different temperatures (298, 304 and 310K) and the results showed that the BFLX caused the fluorescence quenching of BSA through a static quenching...

article

Novel fluorescent polymeric nanoparticles for highly selective recognition of copper ion and sulfide anion in water

Jian Chen, Ya Li, Weibang Zhong, Qingyang Hou, more

Sensors & Actuators: B. Chemical > 2015 > 206 > Complete > 230-238

In the present study, a fluorescence resonance energy transfer (FRET)-mediated multifunctional sensor based on fluorescent polymeric nanoparticles was synthesized via a combination of a facile one-pot miniemulsion polymerization and subsequently by surface modification technology. Firstly, fluorescent polymeric nanoparticles were obtained by copolymerization of styrene, vinylbenzylchloride and the...

article

One‐pot preparation of multicolor polymeric nanoparticles with high brightness by single wavelength excitation

Jian Chen, Fuhua Huang, Hong Wang, Ya Li, more

Journal of Applied Polymer Science > 132 > 8 > n/a - n/a

Fluorescent nanoparticles with multiplex distinct emission signatures and high brightness by a single wavelength excitation are substantially needed in multiplex bioassays and imaging. In this study, we synthesized fluorescent polymeric nanoparticles incorporated with three polymerizable organic dyes via a one‐pot miniemulsion. By altering the doping ratio of three tandem dyes, the nanoparticles display...

article

Assignment of aromaticity of the classic heterobenzenes by three aromatic criteria

Bo Hou, Pinggui Yi, Zhaoxu Wang, Shuqun Zhang, more

Computational and Theoretical Chemistry > 2014 > 1046 > Complete > 20-24

Aromaticity is a key concept in physical organic chemistry. The aromatic order of the classic heterobenzenes was reported in experiment early. However, the unambiguous criteria used to validate the aromaticity of that were controversial or inadequate in theory. In this work, the global aromaticity of the compounds has been studied using the ELF, NICS and ISE. NICS(max) _zz was calculated based...

article

Interaction between pirenoxine and bovine serum albumin in aqueous solution

Zhixi Liao, Xianyong Yu, Qing Yao, Pinggui Yi

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2014 > 129 > Complete > 314-319

This work concerns the interaction of prenoxine sodium (PRX) and bovine serum albumin (BSA), which was conducted by spectroscopic means: fluorescence spectra, ultraviolet–visible spectra (UV–vis) and circular dichroism spectra (CD spectra) in physiological conditions. The results revealed the PRX can quench the fluorescence of BSA remarkably in aqueous solution. The quench mechanism has been obtained...

article

The investigation of the interaction between Tropicamide and bovine serum albumin by spectroscopic methods

Xianyong Yu, Zhixi Liao, Qing Yao, Heting Liu, more

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2014 > 118 > Complete > 331-336

The fluorescence and ultraviolet–visible (UV–Vis) spectroscopy were explored to study the interaction between Tropicamide (TA) and bovine serum albumin (BSA) at three different temperatures (292, 301 and 310K) under imitated physiological conditions. The experimental results showed that the fluorescence quenching mechanism between TA and BSA was static quenching procedure. The binding constant (K...

article

Spectroscopic studies on the interaction of carteolol hydrochloride and urea-induced bovine serum albumin

Qing Yao, Xianyong Yu, Tongyin Zheng, Heting Liu, more

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2013 > 113 > Complete > 447-451

The interaction of carteolol hydrochloride, to 0.2molL ⁻¹ urea-induced bovine serum albumin in aqueous solution has been first investigated by fluorescence spectra and ultraviolet–visible (UV–vis) spectra at pH 7.40. The quenching mechanism, binding parameter and sites (n), the binding mode (ΔG, ΔH, and ΔS) as well as the binding distance (r) have been obtained according to the experimental...

article

Theoretical characters and nature of the intermolecular lithium bonded interactions B⋯LiCN/LiNC (B=pyridine, furan and thiophene)

Baishu Zheng, Bo Hou, Zhaoxu Wang, Pinggui Yi, more

Computational and Theoretical Chemistry > 2013 > 1017 > Complete > 153-158

The characters (geometries, interaction energies, and electronic properties, etc.) of the intermolecular interactions between heteroaromatic rings (C ₅ H ₅ N, C ₄ H ₄ O and C ₄ H ₄ S) and Lewis acids (LiCN, LiNC) have been studied at the MP2/aug-cc-pVTZ level. Two types of interactions are observed: N/O⋯Li (type I) and π⋯Li (type II) bonded interactions...

article

Effect of metal cations [Li⁺, Na⁺, K⁺, Be²⁺, Mg²⁺, and Ca²⁺] on the structure of 2‐(3′‐hydroxy‐2′‐pyridyl)benzoxazole: A theoretical investigation

Pinggui Yi, Zhengjun Liu, Zhaoxu Wang, Xianyong Yu, more

International Journal of Quantum Chemistry > 113 > 9 > 1316 - 1324

Density functional theory calculations were performed at the B3LYP/6‐311++G(d,p) level to systematically explore the geometrical multiplicity and binding strength for the complexes formed by alkaline and alkaline earth metal cations, viz. Li⁺, Na⁺, K⁺, Be²⁺, Mg²⁺, and Ca²⁺ (Mⁿ⁺, hereinafter), with 2‐(3′‐hydroxy‐2′‐pyridyl)benzoxazole. A total of 60 initial structures were designed and optimized, of...

article

The investigation of the interaction between Oxymetazoline hydrochloride and mucin by spectroscopic approaches

Xianyong Yu, Heting Liu, Ying Yang, Shiyu Lu, more

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2013 > 103 > Complete > 125-129

The fluorescence and ultraviolet spectroscopy were explored to study the interaction between Oxymetazoline hydrochloride (OMZH) and mucin under imitated physiological condition. The results demonstrated that the fluorescence quenching mechanism between OMZH and mucin is a combined quenching process. The binding constants (K _a ), binding sites (n) and the corresponding thermodynamic parameters...

article

Spectroscopic analysis of the interaction between thiazolo[2,3-b]pyrimidine analogues and bovine serum albumin

Xianyong Yu, Ying Yang, Qing Yao, Hongwen Tao, more

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2012 > 96 > Complete > 690-697

The interaction between thiazolo[2,3-b]pyrimidine (TZPM) analogues and bovine serum albumin (BSA) was investigated by fluorescence spectroscopy and UV–Vis spectroscopy at two different temperatures (299 and 307K) under imitated physiological conditions. The results indicate that both static quenching and dynamic quenching contribute to the fluorescence quenching of BSA by TZPM. The binding constant...

article

Study on the interaction between novel spiro pyrrolidine and bovine serum albumin by spectroscopic techniques

Xianyong Yu, Ying Yang, Xin Zou, Hongwen Tao, more

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2012 > 94 > Complete > 23-29

Spiro pyrrolidines, which were proved with diverse and potent biological activities and they were discovered widespread in nature. In this paper, using fluorescence and ultraviolet spectroscopy, we investigated the interactions between novel spiro pyrrolidine (NSP) and bovine serum albumin (BSA) under the imitated physiological condition. The results show that the NSP binds to BSA molecules. Static...

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Search results for: Pinggui Yi

Theoretical studies of π-electron delocalization and localization on intramolecular proton transfer in the ground state

Two-photon fluorescent probe for lysosome-targetable hypochlorous acid detection within living cells

A silica nanoparticle-based dual-responsive ratiometric probe for visualizing hypochlorite and temperature with distinct fluorescence signals

Pyridine‐Fused Bis(Norcorrole) through Hantzsch‐Type Cyclization: Enhancement of Antiaromaticity by an Aromatic Bridge

Pyridine‐Fused Bis(Norcorrole) through Hantzsch‐Type Cyclization: Enhancement of Antiaromaticity by an Aromatic Bridge

One-pot fabrication of FRET-based fluorescent probe for detecting copper ion and sulfide anion in 100% aqueous media

Polymer nanoparticle-based ratiometric fluorescent probe for imaging Hg2+ ions in living cells

Cyclam-functionalized carbon dots sensor for sensitive and selective detection of copper(II) ion and sulfide anion in aqueous media and its imaging in live cells

Study on the interaction between Besifloxacin and bovine serum albumin by spectroscopic techniques

Novel fluorescent polymeric nanoparticles for highly selective recognition of copper ion and sulfide anion in water

One‐pot preparation of multicolor polymeric nanoparticles with high brightness by single wavelength excitation

Assignment of aromaticity of the classic heterobenzenes by three aromatic criteria

Interaction between pirenoxine and bovine serum albumin in aqueous solution

The investigation of the interaction between Tropicamide and bovine serum albumin by spectroscopic methods

Spectroscopic studies on the interaction of carteolol hydrochloride and urea-induced bovine serum albumin

Theoretical characters and nature of the intermolecular lithium bonded interactions B⋯LiCN/LiNC (B=pyridine, furan and thiophene)

Effect of metal cations [Li⁺, Na⁺, K⁺, Be²⁺, Mg²⁺, and Ca²⁺] on the structure of 2‐(3′‐hydroxy‐2′‐pyridyl)benzoxazole: A theoretical investigation

The investigation of the interaction between Oxymetazoline hydrochloride and mucin by spectroscopic approaches

Spectroscopic analysis of the interaction between thiazolo[2,3-b]pyrimidine analogues and bovine serum albumin

Study on the interaction between novel spiro pyrrolidine and bovine serum albumin by spectroscopic techniques

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