Structures and Liquid Crystalline Properties of Monoarmed Crown Ethers

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (3): 405.

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Structures and Liquid Crystalline Properties of Monoarmed Crown Ethers

QIN Jun¹, XIE Ming-Gui², HU Zi-Lun², JIANG Qing², ZHAO Hua-Ming²

1. Department of Chemistry, Third Military Medical University, Chongqing 630038;
2. Department of Chemistry, Sichuan University, Chengdu 610064

Received:1994-03-12 Revised:1994-09-30 Online:1995-03-24 Published:1995-03-24

Abstract

Abstract: With the aid of CPK molecular model,three monoarmed alicyclic crown ether containing 15-crown-5 unit liquid crystals (1-3) were first synthesized.The transition temperatures were T_KSc*-7.5 T_Sc*N 18.2 T_NI23.6 for 1,T_KI91.1 T_IN82.6T_NSc*70.4 T_Sc*K 50.3 for 2and T_KC 33.87 T_CN 46.7 T_NI 64.4 for 3. The relationship between structures and properties was investigated,which revealed that monoarmed crown ether liquid crystals could possess mesomorphism not only when the ratio of molecular length to diameter was larger than 3,but also the molecular plarity was required.By inserting chiral group,chiral smetic phases were resulted.It is worth mentioning that the synthesis of crown ether liquid crystals with chirality is hitherto also a new attempt.

Key words: Crown ether liquid crystals, Liquid crystalline properties, Structures

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QIN Jun, XIE Ming-Gui, HU Zi-Lun, JIANG Qing, ZHAO Hua-Ming. Structures and Liquid Crystalline Properties of Monoarmed Crown Ethers[J]. Chem. J. Chinese Universities, 1995, 16(3): 405.

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Structures and Liquid Crystalline Properties of Monoarmed Crown Ethers

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