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  • 05월 20일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제125회 대한화학회 학술발표회 및 총회 Polymorphism control of zinc phthalocyanine nanowires in physical vapor transport system for increased water dispersibility

등록일
2020년 2월 4일 17시 50분 53초
접수번호
0295
발표코드
INOR.P-88 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
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발표형식
포스터
발표분야
Inorganic Chemistry
저자 및
공동저자
Youngkwan Yoon, Hee Cheul Choi*
Department of Chemistry, Pohang University of Science and Technology, Korea
Polymorphism is an important structural variation, according to which its properties may significantly vary. Unfortunately, Not much is known for the selective growth of materials in specific structures, especially for molecular crystals. In this presentation, we discuss our recent achievements on the polymorphism control of zinc phthalocyanine (ZnPc) nanowires (NWs) in a physical vapour transport (PVT) system via flow rate control of carrier gas, which leads to the increased water dispersibility. Among various polymorphs of ZnPc crystals, α-form ZnPc NW, a kinetically favorable form of ZnPc, is an efficient photosensitizer for the photodynamic cancer therapy, especially when it is formed into NWs due to their high water dispersibility. To make a full advantage, it is necessary to selectively grow the kinetically favorable α-form ZnPc NWs only over thermodynamically favorable β-form ZnPc NWs. We successfully obtained high-yield (~98 %) of kinetically favorable α-form ZnPc NWs that show a very high dispersibility in water without significant aggregation after prolonged time of preparation. The flow rate of carrier gas was the key for dominant growth of α-form ZnPc NWs, which affects the size of crystals that determine the crystal phase of ZnPc. We confirmed that α-form ZnPc NWs dominantly grew as flow rate increased and weight percent of α-form ZnPc NWs in the product reached over 98% at the flow rate of 2000 sccm. With these results, we believe that our findings would contribute to the development of novel strategies for the selective growth of high-quality kinetically favorable crystals having a specific structure, and provide great opportunities for their various practical applications.

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