Literature DB >> 26553028

Interaction of Graphene Quantum Dots with 4-Acetamido-2,2,6,6-Tetramethylpiperidine-Oxyl Free Radicals: A Spectroscopic and Fluorimetric Study.

Ojodomo J Achadu1, Tebello Nyokong2.   

Abstract

We report on the interaction of graphene quantum dots (GQDs) with 4-acetamido-2,2,6,6-tetramethylpiperidine-oxyl (4-acetamido-TEMPO) free radicals. The GQDs were N and S, N doped. The fluorescence quantum yields were higher for the doped GQDs compared to the undoped. The interaction is assessed by spectrofluorimetric, steady state/time resolved fluorescence and electron paramagnetic resonance (EPR) techniques. Fluorescence quenching was observed upon the addition of 4-acetamido-TEMPO to the GQDs. Photo-induced electron transfer (PET) mechanism was suggested as the plausible mechanism involved in the fluorescence quenching in which 4-acetamido-TEMPO acted as the electron acceptor.

Entities:  

Keywords:  Fluorescence quenching; Free radicals; Graphene quantum dots; Stern-volmer quenching constant

Year:  2015        PMID： 26553028     DOI： 10.1007/s10895-015-1712-0

Source DB:  PubMed          Journal:  J Fluoresc        ISSN： 1053-0509            Impact factor:   2.217


  26 in total

1.  Tunable photoluminescence from graphene oxide.

Authors:  Chih-Tao Chien; Shao-Sian Li; Wei-Jung Lai; Yun-Chieh Yeh; Hsin-An Chen; I-Shen Chen; Li-Chyong Chen; Kuei-Hsien Chen; Takashi Nemoto; Seiji Isoda; Mingwei Chen; Takeshi Fujita; Goki Eda; Hisato Yamaguchi; Manish Chhowalla; Chun-Wei Chen
Journal:  Angew Chem Int Ed Engl       Date:  2012-05-23       Impact factor: 15.336

2.  The electron-transfer based interaction between transition metal ions and photoluminescent graphene quantum dots (GQDs): a platform for metal ion sensing.

Authors:  Hongduan Huang; Lei Liao; Xiao Xu; Mingjian Zou; Feng Liu; Na Li
Journal:  Talanta       Date:  2013-09-04       Impact factor: 6.057

3.  A graphene quantum dot-based method for the highly sensitive and selective fluorescence turn on detection of biothiols.

Authors:  Zhenzhu Wu; Wenying Li; Jian Chen; Cong Yu
Journal:  Talanta       Date:  2013-12-01       Impact factor: 6.057

Review 4.  Focusing on luminescent graphene quantum dots: current status and future perspectives.

Authors:  Lingling Li; Gehui Wu; Guohai Yang; Juan Peng; Jianwei Zhao; Jun-Jie Zhu
Journal:  Nanoscale       Date:  2013-05-21       Impact factor: 7.790

5.  Multicolor fluorescent graphene quantum dots colorimetrically responsive to all-pH and a wide temperature range.

Authors:  Fanglong Yuan; Ling Ding; Yunchao Li; Xiaohong Li; Louzhen Fan; Shixin Zhou; Decai Fang; Shihe Yang
Journal:  Nanoscale       Date:  2015-06-23       Impact factor: 7.790

6.  Using graphene quantum dots as photoluminescent probes for protein kinase sensing.

Authors:  Ying Wang; Li Zhang; Ru-Ping Liang; Jian-Mei Bai; Jian-Ding Qiu
Journal:  Anal Chem       Date:  2013-09-19       Impact factor: 6.986

7.  The photophysical properties of multi-functional quantum dots-magnetic nanoparticles--indium octacarboxyphthalocyanine nanocomposite.

Authors:  Charmaine Tshangana; Tebello Nyokong
Journal:  J Fluoresc       Date:  2014-12-17       Impact factor: 2.217

8.  Graphene quantum dots as fluorescence probes for turn-off sensing of melamine in the presence of Hg(2+).

Authors:  Lingling Li; Gehui Wu; Tao Hong; Zhouyang Yin; Dong Sun; E S Abdel-Halim; Jun-Jie Zhu
Journal:  ACS Appl Mater Interfaces       Date:  2014-02-05       Impact factor: 9.229

9.  Controllable size-selective method to prepare graphene quantum dots from graphene oxide.

Authors:  Tianju Fan; Wenjin Zeng; Wei Tang; Chunqiu Yuan; Songzhao Tong; Kaiyu Cai; Yidong Liu; Wei Huang; Yong Min; Arthur J Epstein
Journal:  Nanoscale Res Lett       Date:  2015-02-08       Impact factor: 4.703

10.  Structural relationship and binding mechanisms of five flavonoids with bovine serum albumin.

Authors:  E-Hu Liu; Lian-Wen Qi; Ping Li
Journal:  Molecules       Date:  2010-12-09       Impact factor: 4.411
View more
  3 in total

1.  Nonlinear Interactions of Zinc Phthalocyanine-Graphene Quantum Dots Nanocomposites: Investigation of Effects of Surface Functionalization with Heteroatoms.

Authors:  Owolabi M Bankole; Ojodomo J Achadu; Tebello Nyokong
Journal:  J Fluoresc       Date:  2017-01-04       Impact factor: 2.217

2.  Graphene Quantum Dots Functionalized with 4-Amino-2, 2, 6, 6-Tetramethylpiperidine-N-Oxide as Fluorescence "Turn-ON" Nanosensors.

Authors:  Ojodomo J Achadu; Jonathan Britton; Tebello Nyokong
Journal:  J Fluoresc       Date:  2016-09-13       Impact factor: 2.217

3.  Tuning the Photoluminescence of Graphene Quantum Dots by Photochemical Doping with Nitrogen.

Authors:  Xiaofen Xu; Fuhua Gao; Xiaohua Bai; Fuchi Liu; Wenjie Kong; Ming Li
Journal:  Materials (Basel)       Date:  2017-11-20       Impact factor: 3.623
  3 in total

北京卡尤迪生物科技股份有限公司 © 2022-2023.