Accession Number : ADA536069


Title :   Porphyrin-Embedded Silicate Materials for Detection of Hydrocarbon Solvents


Descriptive Note : Journal article


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC CENTER FOR BIOMOLECULAR SCIENCE AND ENGINEERING


Personal Author(s) : Johnson, Brandy J ; Anderson, Nicole E ; Charles, Paul T ; Malanoski, Anthony P ; Melde, Brian J ; Nasir, Mansoor ; Deschamps, Jeffrey R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a536069.pdf


Report Date : 14 Jan 2011


Pagination or Media Count : 20


Abstract : The development of porphyrin-embedded mesoporous organosilicate materials for application to the detection of volatile hydrocarbon solvents is described. Design of the receptor and optical indicator construct begins with parallel selection of the porphyrin indicator and design of the mesoporous sorbent. For the porphyrin indicator, high binding affinity and strong changes in spectrophotometric character upon target interaction are desired. The sorbent should provide high target binding capacity and rapid binding kinetics. A number of porphyrin/metalloporphyrin variants and organosilicate sorbents were evaluated to determine the characteristics of their interaction with the targets, benzene, toluene, and hexane. The selected porphyrin candidates were covalently immobilized within a benzene-bridged sorbent. This construct was applied to the detection of targets using both fluorescence- and reflectance-based protocols. The use of red, green, and blue (RGB) color values from the constructs in a highly simplified detection scheme is described.


Descriptors :   *SOLVENTS , *PORPHYRINS , *ADSORBENTS , *HYDROCARBONS , *DETECTION , HEXANES , MICROBALANCES , REFLECTANCE , HIERARCHIES , REPRINTS , FLUORESCENCE , TOLUENES , BENZENE , POROSITY


Subject Categories : Organic Chemistry
      Physical Chemistry
      Miscellaneous Materials
      Solvents, Cleaners, and Abrasives
      Miscellaneous Detection and Detectors


Distribution Statement : APPROVED FOR PUBLIC RELEASE