Roles of Metal Complex and Hydrogen Bond in Molecular Structures and Phase Behaviors of MetalN-Octadecanoyl-L-alaninate Langmuir−Blodgett Films

2000 ◽  
Vol 104 (43) ◽  
pp. 10047-10052 ◽  
Author(s):  
Xuezhong Du ◽  
Yingqiu Liang
Keyword(s):  
Hydrogen Bond ◽  
Metal Complex ◽  
Molecular Structures ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films ◽  
Phase Behaviors

Aggregation-Induced Linear and Non-Linear Optical Properties of Four Hydroxy-Substituted Analogues of 2,4-Bis[4-(dibutylamino)phenyl]squaraine

1998 ◽  
Vol 51 (7) ◽  
pp. 599 ◽  
Author(s):  
Geoffrey J. Ashwell ◽  
Patricia C. Williamson ◽  
Andrew Green ◽  
Gurmit S. Bahra ◽  
Christopher R. Brown
Keyword(s):  
Second Harmonic ◽  
Solid Substrate ◽  
Molecular Structures ◽  
High Mass ◽  
Ionization Mass ◽  
Langmuir Blodgett ◽  
Non Linear ◽  
Langmuir Blodgett Films ◽  
Linear Optical Properties ◽  
Linear Optical

Langmuir films of the title compound, 2,4-bis[4-(dibutylamino)phenyl]squaraine, Sq0, and its substituted analogues, Sq1 (monohydroxy) to Sq4 (tetrahydroxy), exhibit three well defined phases at the air–water interface: λmax 525–550 nm (H-aggregate); 660–670 nm (intermediate); 760–770 nm (J-aggregate). The monolayer spectra are influenced by the surface pressure and the number of hydroxy substituents and, when the monolayers are transferred to a solid substrate, there is a correlation between the linear and non-linear optical behaviour of the Langmuir-Blodgett films. Second-harmonic generation has been observed even though the unit molecular structures of two analogues, Sq0 and Sq4, are centric. The behaviour is aggregation-induced and there is evidence that the dyes associate in dilute solution. The electrospray ionization mass spectra exhibit peaks with high mass/charge (m/z) ratios; the data conform to the dimeric aggregate and, for solutions of two or more squaraines, corroborate the existence of heteromolecular associates.

Fabrication and Electrical Properties of Dendrimer Langmuir-Blodgett Films Based on Metal Complex

2003 ◽  
Vol 42 (Part 1, No. 4B) ◽  
pp. 2434-2437 ◽  
Author(s):  
Sang-Burm Jung ◽  
Seung-Yeop Yoo ◽  
Chungkyun Kim ◽  
Young-Soo Kwon
Keyword(s):  
Electrical Properties ◽  
Metal Complex ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films

Langmuir and Langmuir-Blodgett film preparation and study of a metalloporphyrin dimer molecule

2005 ◽  
Vol 09 (04) ◽  
pp. 275-284 ◽  
Author(s):  
Yuhua Ni ◽  
Qun Huo
Keyword(s):  
Barbituric Acid ◽  
Network Formation ◽  
Molecular Structures ◽  
Switching Behavior ◽  
Iron Porphyrin ◽  
Supramolecular Network ◽  
Lb Films ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films ◽  
Iron Porphyrin Complexes

Two iron complexes of a porphyrin dimer molecule were synthesized and studied at the air-water interface and in Langumir-Blodgett (LB) films. Surface pressure-area isotherm and UV-vis absorption spectroscopic studies revealed an interesting molecular switching behavior between the two iron porphyrin complexes under basic or acidic conditions. Such a reversible structural transition does not only occur in solution phase, but readily takes place in the deposited Langmuir-Blodgett films. Domains with strip or disk-like shapes were formed in the Langmuir films of the metalloporphyrin complexes when barbituric acid was added into the subphase, an indication of supramolecular network formation between the metalloporphyrin dimer and barbituric acid molecules. Magnetic property studies of the Langmuir-Blodgett films of the iron porphyrin complexes by magnetic force microscopy provide further insights into relationships between the magnetic response and molecular structures of the metalloporphyrin LB films.

Studies of Langmuir−Blodgett Films of an Ion Pair Metal Complex Containing Eu(III)-Ru(II) Dual Chromophores

2006 ◽  
Vol 110 (14) ◽  
pp. 7402-7408 ◽  
Author(s):  
Li-Hua Gao ◽  
Ke-Zhi Wang ◽  
Li Cai ◽  
Hao-Xu Zhang ◽  
Lin-Pei Jin ◽  
...  
Keyword(s):  
Metal Complex ◽  
Ion Pair ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films

Langmuir-blodgett films of liquid-crystalline heteroaromatic cations associated with diamagnetic (BF4-, CIO4-) or paramagnetic (TCNQ[math]) anions

1988 ◽  
Vol 85 ◽  
pp. 385-389 ◽  
Author(s):  
M. Vandevyver ◽  
J. Richard ◽  
A Barraud ◽  
M. Veber ◽  
C Jallabert ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films
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