Phase behavior of didodecyldimethylammonium bromide

被引：10

作者：

Godlewska, M ^{[1
]}

Wrobel, S ^{[1
]}

BorzeckaProkop, B ^{[1
]}

Michalec, M ^{[1
]}

Dynarowicz, P ^{[1
]}

机构：

[1] JAGIELLONIAN UNIV,FAC CHEM,PL-30060 KRAKOW,POLAND

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1997年 / 300卷

关键词：

didodecyldimethylammonium bromide; ionic liquid crystals; phase transitions;

D O I：

10.1080/10587259708042342

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Phase situation of didodecyldimethylammonium bromide (DDAB) was investigated by means of differential scanning calorimetry, X-Ray diffraction and optical microscopy methods. A complex polymorphism was detected. Apart from the crystalline phase on hearing there are two liquid crystalline phases below the isotropic liquid and on cooling a third phase appears. The study shows that DDAB exhibits highly ordered layered liquid crystalline structures. The high-temperature phase which appears below the isotropic phase can he identified as SmB phase. The influence of thermal history the polymorphism of DDAB was studied. The enthalpy changes at the transitions were calculated.

引用

页码：113 / &

页数：19

共 13 条

[1] A NEW SMECTIC MESOPHASE WITH 2-DIMENSIONAL TETRAGONAL SYMMETRY FROM DIALKYLDIMETHYLAMMONIUM BROMIDES-ST
ALAMI, E
LEVY, H
ZANA, R
WEBER, P
SKOULIOS, A
[J]. LIQUID CRYSTALS, 1993, 13 (02) : 201 - 212
[2] Demus D., 1978, TEXTURES LIQUID CRYS
[3] GODLEWSKA M, UNPUB
[4] Gray G.W.J.W.G. Goodby., 1984, SMECTIC LIQUID CRYST
[5] KAJIYAMA T, 1984, CONTEMP TOP POLYM S, V4, P829
[6] Kelker HC., 1980, Handbook of liquid crystals
[7] TOTALLY SYNTHETIC BILAYER MEMBRANE
KUNITAKE, T
OKAHATA, Y
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1977, 99 (11) : 3860 - 3861
[8] PHYSICAL SCIENCE OF THE DIOCTADECYLDIMETHYLAMMONIUM CHLORIDE WATER-SYSTEM .1. EQUILIBRIUM PHASE-BEHAVIOR
LAUGHLIN, RG
MUNYON, RL
FU, YC
FEHL, AJ
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1990, 94 (06) : 2546 - 2552
[9] BIOMINERALIZATION AND BIOMIMETIC MATERIALS CHEMISTRY
MANN, S
[J]. JOURNAL OF MATERIALS CHEMISTRY, 1995, 5 (07) : 935 - 946
[10] MOLECULAR AND CRYSTAL-STRUCTURE OF THE LIPID-MODEL AMPHIPHILE, DIOCTADECYLDIMETHYLAMMONIUM BROMIDE MONOHYDRATE
OKUYAMA, K
SOBOI, Y
IIJIMA, N
HIRABAYASHI, K
KUNITAKE, T
KAJIYAMA, T
[J]. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1988, 61 (05) : 1485 - 1490

← 1 2 →