Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved fulvic and humic acids.

Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved fulvic and humic acids. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved fulvic and humic acids. Abstract Text:

Praveen Gadad,Hongxia Lei,Mark A Nanny,Praveen Gadad,Hongxia Lei,Mark A Nanny,

Noncovalent interactions between the fluorescent probe 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved Norman Landfill leachate fulvic acid, Suwannee River fulvic acid, Suwannee River humic acid, and Leonardite humic acid were examined as a function of pH, fulvic and humic acid (FA and HA) concentration, and solvent polarity using steady-state fluorescence spectroscopy. Static quenching processes, as indicated by linear Stern-Volmer plots and high K(d) values, were positively correlated with the % aromaticity of the FA and HAs, as well as with solution pH. Results illustrate that for FA molecules with relatively low % aromaticity values, solvophobic interactions between PRODAN and FA are the primary interaction mode. For HA molecules with higher % aromaticity, PRODAN engages in both solvophobic interactions and pi-pi interactions, in particular electron donor-acceptor interactions, via condensed aromatic, electron-accepting moieties inherent within HA molecules. Experiments modifying solvent polarity demonstrated that protonation of carboxylic acid functional groups at low pH ( approximately 4) increased the hydrophobicity of the dissolved FA and HA molecules, thereby enhancing noncovalent interactions with PRODAN through increased solvophobic forces.

Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved fulvic and humic acids. Publishing Authors By Initials

P Gadad,H Lei,MA Nanny,P Gadad,H Lei,MA Nanny,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved fulvic and humic acids. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Water research

VOLUME: 41

Page Numbers: 4488-96

Journal Abbreviation: Water Res.

ISSN: 0043-1354

DAY: 13

MONTH: 06

YEAR: 2007

Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved fulvic and humic acids. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 105072

Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved fulvic and humic acids. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved fulvic and humic acids. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved fulvic and humic acids.

AFFILIATION: School of Civil Engineering and Environmental Science, College of Engineering, The University of Oklahoma, Norman 73019, USA.

Country: England

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Water Res

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene PRODAN and dissolved fulvic and humic acids Related Publications

• Characterization and quantification of reversible redox sites in humic substances.
• Characterization of noncovalent interactions between 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and dissolved fulvic and humic acids.