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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Jain, Vinod K. Vyas, Disha J. Makwana, Bharat A. Darjee, Savan M. Bhatt, Keyur D. |
| Description | Country affiliation: India Author Affiliation: Bhatt KD ( Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India.); Vyas DJ ( Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India.); Makwana BA ( Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India.); Darjee SM ( Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India.); Jain VK ( Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India. Electronic address: drvkjain@hotmail.com.) |
| Abstract | Water dispersible stable gold nanoparticles (AuNps) have been synthesized by using calix[4]pyrrole octa-hydrazide (CPOH) as a reducing as well as stabilizing agent. CPOH-AuNps have been characterized by surface plasmon resonance, particle size analyzer and transmission electron microscopy. CPOH-AuNps are water dispersible, highly stable for more than 150 days at neutral pH with a size of less than 10nm and zeta potential of 15±2 MeV. Ion sensing property of CPOH-AuNps has been investigated for various metal ions Pb(II), Cd(II), Mn(II), Fe(III), Ni(II), Zn(II), Hg(II), Co(II) and Cu(II) by colorimetry and spectrofluorimetry. Among all the metal ions investigated, only Co(II) ions gives sharp colour change from ruby red to blue and is easily detectable by naked-eye. CPOH-AuNps being fluorescent in nature also shows great sensitivity and selectivity for Co(II) ions. Co(II) ions can be selectively detected at very low concentration level of 1 nM in a facile way of fluorescence quenching. |
| ISSN | 13861425 |
| Volume Number | 121 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-01-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Calixarenes Chemistry Cobalt Analysis Colorimetry Instrumentation Fluorometry Gold Metal Nanoparticles Porphyrins Water Cations Hydrogen-ion Concentration Ultrastructure Particle Size Spectrometry, Fluorescence Spectrometry, X-ray Emission Spectrophotometry, Ultraviolet Surface Plasmon Resonance Time Factors Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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