Colorimetric sensor arrays for volatile organic compounds.
The development of a low-cost, sensitive colorimetric sensor array for the detection and identification of volatile organic compounds (VOCs) is reported. Using an array composed of chemoresponsive dyes, enormous discriminatory power is possible in a simple device that can be imaged easily with an ordinary flatbed scanner. Excellent differentiation of closely related organic compounds can be achieved, and a library of 100 VOCs is presented. The array discriminates among VOCs by probing a wide range of intermolecular interactions, including Lewis acid/base, Brønsted acid/base, metal ion coordination, hydrogen bonding, and dipolar interactions. Importantly, by proper choice of dyes and substrate, the array is essentially nonresponsive to changes in humidity.
Janzen
Michael C
MC
Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenur, Urbana, Illinois 61801, USA.
Ponder
Jennifer B
JB
Bailey
Daniel P
DP
Ingison
Crystal K
CK
Suslick
Kenneth S
KS
D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods*; D003124:Colorimetry / Q000379:methods; D007700:Kinetics; D009930:Organic Chemicals / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D012996:Solutions; D014835:Volatilization
D009930:Organic Chemicals; D012996:Solutions; D012822:Silicon Dioxide