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Masthay MB, McLean JB, Santos AL, Pirlo RK, Biffinger JC. Calculation of the Relative Basicity of Three α,ω‐Diphenylpolyenes with Trifluoroacetic Acid. J PHYS ORG CHEM 2022. [DOI: 10.1002/poc.4412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mark B. Masthay
- Chemistry Department, University of Dayton 300 College Park Dayton OH U.S.A
| | - Jack B. McLean
- Chemistry Department, University of Dayton 300 College Park Dayton OH U.S.A
| | - Ariana L. Santos
- Chemistry Department, University of Dayton 300 College Park Dayton OH U.S.A
| | - Russell K. Pirlo
- Chemical Engineering Department, University of Dayton 300 College Park Dayton OH
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Shesham V, Kelly AL, Burke W, Crouch A, Drake CA, Varaljay VA, Crookes-Goodson WJ, Barlow DE, Masthay MB, Biffinger JC. Comparison of two diphenyl polyenes as acid-sensitive additives during the biodegradation of a thermoset polyester polyurethane coating. J Appl Microbiol 2021; 132:351-364. [PMID: 34297452 DOI: 10.1111/jam.15228] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/02/2021] [Accepted: 07/19/2021] [Indexed: 11/28/2022]
Abstract
AIMS Biochemical hydrolysis and chemical catalysis are involved in the successful biodegradation of polymers. In order to evaluate the potential separation between biochemical and chemical catalysis during the biodegradation process, we report the use of two diphenylpolyenes (DPPs), all trans-1,4-diphenylbutadiene (DPB) and all trans-1,6-diphenylhexatriene (DPH), as potential acid-sensitive indicators in polymers. METHODS AND RESULTS 1,4-Diphenylbutadiene and DPH (0.1% w/w) were melt-cast successfully with poly(ethylene succinate) hexamethylene (PES-HM) polyurethane (thermoset polyester polyurethane) coatings above 80℃. When these two DPP/PES-HM coatings were exposed to a concentrated supernatant with significant esterase activity resulting from the growth of a recently isolated and identified strain of Tremellomycetes yeast (Naganishia albida 5307AI), the DPB coatings exhibited a measurable and reproducible localized decrease in the blue fluorescence emission in regions below where hydrolytic biodegradation was initiated in contrast with DPH blended coatings. The fluorescence changes observed in the biodegraded DPB coating were similar to exposing them to concentrated acids and not bases. CONCLUSIONS Our experiments resulted in (1) a method to blend DPP additives into thermoset coatings, (2) the first report of the biodegradation of polyester polyurethane coating by N. albida, and (3) demonstration that hydrolytic supernatants from this strain generate acidic region within degrading polyester coatings using DPB as the indicator. SIGNIFICANCE AND IMPACT OF THE STUDY Our experiments confirm that N. albida is an active polyester degrader and that DPB is a promising acid sensitive polymer coating additive.
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Affiliation(s)
| | - Abigail L Kelly
- Chemistry Department, University of Dayton, Dayton, Ohio, USA
| | - William Burke
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio, USA.,UES, Inc, Dayton, Ohio, USA
| | - Audra Crouch
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio, USA.,UES, Inc, Dayton, Ohio, USA
| | - Carrie A Drake
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio, USA.,UES, Inc, Dayton, Ohio, USA
| | - Vanessa A Varaljay
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio, USA
| | - Wendy J Crookes-Goodson
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio, USA
| | - Daniel E Barlow
- Chemistry Division, US Naval Research Laboratory, Washington, District of Columbia, USA
| | - Mark B Masthay
- Chemistry Department, University of Dayton, Dayton, Ohio, USA
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Ohta K, Naitoh Y, Tominaga K, Yoshihara K. Excited-State Dynamics of all-trans-1,3,5,7-Octatetraene in Solution. Direct Observation of Internal Conversion from the S2 to S1 State and Relaxation Processes in the S1 State. J Phys Chem A 2001. [DOI: 10.1021/jp003969i] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kaoru Ohta
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan and Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
| | - Yukito Naitoh
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan and Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
| | - Keisuke Tominaga
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan and Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
| | - Keitaro Yoshihara
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan and Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
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Ohta K, Naitoh Y, Tominaga K, Hirota N, Yoshihara K. Femtosecond Transient Absorption Studies of trans- and cis-1,3,5-Hexatriene in Solution. J Phys Chem A 1998. [DOI: 10.1021/jp9725994] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kaoru Ohta
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606, Japan, and Institute for Molecular Science, Myodaiji, Okazaki 444, Japan
| | - Yukito Naitoh
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606, Japan, and Institute for Molecular Science, Myodaiji, Okazaki 444, Japan
| | - Keisuke Tominaga
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606, Japan, and Institute for Molecular Science, Myodaiji, Okazaki 444, Japan
| | - Noboru Hirota
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606, Japan, and Institute for Molecular Science, Myodaiji, Okazaki 444, Japan
| | - Keitaro Yoshihara
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606, Japan, and Institute for Molecular Science, Myodaiji, Okazaki 444, Japan
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Fu\S W, Schikarski T, Schmid WE, Trushin SA, Hering P, Kompa KL. Spectroscopy and ultrafast dynamics of the2A1state ofZ-hexatriene in gas phase. J Chem Phys 1997. [DOI: 10.1063/1.474080] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kohler BE, Spiglanin TA. Vibrationally resolved optical spectra of cis,trans‐1,3,5,7‐octatetraene. J Chem Phys 1984. [DOI: 10.1063/1.447123] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Goldbeck RA, Twarowski AJ, Russell EL, Rice JK, Birge RR, Switkes E, Kliger DS. Excited state absorption spectroscopy and state ordering in polyenes. II. α,ω‐diphenylpolyenes. J Chem Phys 1982. [DOI: 10.1063/1.444250] [Citation(s) in RCA: 40] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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