Photoprocesses in 7-hydroxy coumarins molecules in solutions and SiO2 sol–gel films – Materials for optical chemical sensorics

Photoprocesses in 7-hydroxy coumarins molecules in solutions and SiO2 sol–gel films –... The paper investigates the spectral properties of protolytic forms of three substituted 7-hydroxy coumarin molecules in aqueous ethanol solutions and SiO2 films. It explains spectral-and-luminescent properties of coumarins in the produced films. It is found that in aqueous ethanol solutions and sol–gel films, upon excitation in the S1 state, there is a reaction of proton phototransfer from the О–Н group of neutral coumarins molecules to the water molecule with development of anionic forms solvated by hydroxonium ions. We studied sensory properties of compounds in the films to the ammonia gas in terms of changes in their fluorescent properties and revealed the reasons causing such changes. We demonstrated the prospects of using films with one of the investigated coumarins as the ammonia gas sensitive material of an optical chemical sensor. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Luminescence Elsevier

Photoprocesses in 7-hydroxy coumarins molecules in solutions and SiO2 sol–gel films – Materials for optical chemical sensorics

Loading next page...
 
/lp/elsevier/photoprocesses-in-7-hydroxy-coumarins-molecules-in-solutions-and-sio2-qrAQHN4TBV
Publisher
Elsevier
Copyright
Copyright © 2016 Elsevier B.V.
ISSN
0022-2313
eISSN
1872-7883
D.O.I.
10.1016/j.jlumin.2016.03.033
Publisher site
See Article on Publisher Site

Abstract

The paper investigates the spectral properties of protolytic forms of three substituted 7-hydroxy coumarin molecules in aqueous ethanol solutions and SiO2 films. It explains spectral-and-luminescent properties of coumarins in the produced films. It is found that in aqueous ethanol solutions and sol–gel films, upon excitation in the S1 state, there is a reaction of proton phototransfer from the О–Н group of neutral coumarins molecules to the water molecule with development of anionic forms solvated by hydroxonium ions. We studied sensory properties of compounds in the films to the ammonia gas in terms of changes in their fluorescent properties and revealed the reasons causing such changes. We demonstrated the prospects of using films with one of the investigated coumarins as the ammonia gas sensitive material of an optical chemical sensor.

Journal

Journal of LuminescenceElsevier

Published: Aug 1, 2016

References

  • Appl. Phys.
    Fletcher, A.N.; Pietrak, M.E.; Bliss, D.F.
  • Sens. Actuators B
    Prasad, G.K.; Radhakrishnan, T.P.; Kumar, D. Sravan; Krishna, M. Ghanashyam

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from
Google Scholar,
PubMed
Create lists to
organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off