Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 윤주영 | * |
dc.contributor.author | 김명화 | * |
dc.date.accessioned | 2016-09-21T01:09:19Z | - |
dc.date.available | 2016-09-21T01:09:19Z | - |
dc.date.issued | 2016 | * |
dc.identifier.issn | 1463-9076 | * |
dc.identifier.issn | 1463-9084 | * |
dc.identifier.other | OAK-19264 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/232273 | - |
dc.description.abstract | Photo-curable polymers originating from 10,12-pentacosadiynoic acid (PCDA-PDA) are commonly used polydiacetylenes (PDAs). PCDA-PDA exhibits thermochromic properties undergoing a unique colorimetric transition from blue to red as the temperature is increased from low to high. In this work, we have carefully studied the temperature-dependent optical properties of PCDA-PDA by using UV-visible absorption, FTIR, Raman, and transient absorption (TA) spectroscopy in combination with quantum chemical calculations. Temperature-dependent UV-visible absorption spectra indicate that PCDA-PDA exhibits reversible thermochromic properties up to 60 degrees C and its thermochromic properties become irreversible above 60 degrees C. Such distinct thermochromic properties are also manifested in TA signals so that the electronically excited PCDA-PDA relaxes to the ground state via an intermediate state at 20 degrees C (blue form) but it relaxes directly back to the ground state at 80 degrees C (red form). The electronic relaxation dynamics of PCDA-PDA are comprehensively analyzed based on different kinetic models by using the global fitting analysis method. The intermediate state in the blue form of PCDA-PDA is clearly found to be responsible for fluorescence quenching. FTIR and Raman spectroscopy and quantum chemical calculations confirm that the H-bonds between the carboxylic acid groups in PCDA-PDA are broken at high temperatures leading to an irreversible structural change of PCDA-PDA. | * |
dc.language | English | * |
dc.publisher | ROYAL SOC CHEMISTRY | * |
dc.title | Electronic relaxation dynamics of PCDA-PDA studied by transient absorption spectroscopy | * |
dc.type | Article | * |
dc.relation.issue | 33 | * |
dc.relation.volume | 18 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 23096 | * |
dc.relation.lastpage | 23104 | * |
dc.relation.journaltitle | PHYSICAL CHEMISTRY CHEMICAL PHYSICS | * |
dc.identifier.doi | 10.1039/c6cp03858a | * |
dc.identifier.wosid | WOS:000382109300036 | * |
dc.identifier.scopusid | 2-s2.0-84983427592 | * |
dc.author.google | Joung, Joonyoung F. | * |
dc.author.google | Baek, Junwoo | * |
dc.author.google | Kim, Youngseo | * |
dc.author.google | Lee, Songyi | * |
dc.author.google | Kim, Myung Hwa | * |
dc.author.google | Yoon, Juyoung | * |
dc.author.google | Park, Sungnam | * |
dc.contributor.scopusid | 윤주영(7403587371) | * |
dc.contributor.scopusid | 김명화(57191596821) | * |
dc.date.modifydate | 20240130103418 | * |