| 학회 |
한국고분자학회 |
| 학술대회 |
2014년 가을 (10/06 ~ 10/08, 제주 ICC) |
| 권호 |
39권 2호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Constitutional isomers of a C3-symmetric molecule showing different piezochromic behaviours: on-off switching and colour tuning |
| 초록 |
The piezochromic behaviours of C3-symmetric molecules were studied. Upon grinding, α-BPAN-Br exhibited substantial quenching of a bluish green emission (on-off switching) and its constitutional isomer, β-BPAN-Br, showed an emission colour change from bluish green to deep blue (colour tuning). When the molecules were exposed to an organic vapour, the initial emission of each molecule was restored. The powder X-ray diffraction and DSC studies revealed that the as-synthesized and vapour-annealed samples had the same crystalline structures, while the ground samples had amorphous structures. Their structural analogues, α-BPAN-H and β-BPAN-H which had no bromo groups, did not show any piezochromic or vapochromic behaviour. Poly(β-BPAN) consisting of covalently linked β-BPAN units were prepared by Ullmann reaction of β-BPAN-Br. The polymer showed similar luminescence to that of crystalline β-BPAN-Br, but its initial emission was not changed by grinding. |
| 저자 |
임윤빈1, 최인실2, 이현표1, 김일원2, 장지영1
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| 소속 |
1서울대, 2숭실대 |
| 키워드 |
piezochromism; mechanochromism
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| E-Mail |
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