NDLI: Tunable Photophysical Behavior of a Novel Fluorescent Probe by Silver/Gold and Core

Content Provider	Springer Nature Link
Author	El Nahass, Marwa N. Bakr, Eman A. Fayed, Tarek A.
Copyright Year	2015
Abstract	The photophysical and photochemical behaviors of a novel fluorescent probe, namely 5-(4-(dimethylamino)phenyl)-1-(thiophen-2-yl)penta-2,4-dien-1-one (DMATP), were tuned by solvent effects and colloidal nanoparticle studies. Spectral data show that increasing the solvent polarity results in a significant solvatochromic shift in both the absorption and emission maxima. Also, the effect of deuteration on the photophysical properties of DMATP has been discussed by studying the optical absorption and emission properties of DMATP in nondeuterated solvent like MeOH and deuterated one like MeOD. Additionally, the spectral behavior of the investigated DMATP was tuned by noble nanoparticles such as Au, Ag, and Au@Ag core–shell. Firstly, the noble nanoparticles Au, Ag, and Au@Ag core–shell were synthesized and characterized using UV–vis spectroscopy and transmission electron microscopy (TEM). The absorption band of Ag and Au NPs showed plasmon peaks at 415 and 526 nm, respectively, confirmed the formation of NPs. However, the absorption spectra of Au@Ag core–shell show no evidence of an absorption peak at 526 nm, which was visible for AuNPs, and a blue shifted band at 402 nm has been observed, confirming that the Ag covered the Au seeds to create a bimetallic core–shell configuration nanoparticle. The interactions of DMATP with Au, Ag, and Au@Ag core–shell NPs were also studied based on fluorescence enhancement. The observed improvement in the spectral behaviors of DMATP and the high binding constants by the used NPs and its core–shell suggested that this dye can serve as candidates for many applications such as biological sensing and light-emitting diodes. Finally, the catalytic activity of the synthesized Au@Ag core–shell NPs for the degradation of methyl red has been employed. The obtained products may also have many potential applications in optical, magnetic, biochemical, and biomedical fields.
Starting Page	917
Ending Page	930
Page Count	14
File Format	PDF
ISSN	15571955
Journal	Plasmonics
Volume Number	11
Issue Number	3
e-ISSN	15571963
Language	English
Publisher	Springer US
Publisher Date	2015-11-23
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Deuterated solvent Core–shell Catalytic activity Biomedical fields Biotechnology Nanotechnology Biophysics and Biological Physics Biochemistry
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Biochemistry Biophysics Biotechnology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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