Thermal Behavior of H-Aggregate in a Mixed Langmuir−Blodgett Film of Merocyanine Dye, Arachidic Acid, andn-octadecane Ternary System Investigated by UV−visible and IR Absorption Spectroscopy

2008 ◽  
Vol 112 (45) ◽  
pp. 14158-14167 ◽  
Author(s):  
Yoshiaki Hirano ◽  
Shinsuke Tateno ◽  
Yoshihide Yamashita ◽  
Yukihiro Ozaki
Keyword(s):  
Ternary System ◽  
Thermal Behavior ◽  
Absorption Spectroscopy ◽  
Arachidic Acid ◽  
Ir Absorption ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Uv Visible ◽  
Langmuir Blodgett Film

scholarly journals MIXED LANGMUIR-BLODGETT FILMS OF CU-3,5-BISTETRABUTYL PHENYLPORPHYRIN,ARACHIDATEACIDAND HEXATRIACONTANE IN ORDINARY ENVIRONMENT: AUV VISIBLE STUDY

2009 ◽  
Vol 4 (1) ◽  
Author(s):  
Saprizal Hadisaputra
Keyword(s):  
Arachidic Acid ◽  
Molar Ratio ◽  
Central Metal ◽  
Mixed Solution ◽  
Visible Spectroscopy ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films ◽  
Uv Visible ◽  
Trigger Molecule

> Abstrak. Telah dilakukan studi terhadap multilapis film Langmuir-Blodgett pada kondisi eksperimen seharihari menggunakan campuran Cu-3,5-bistetra-butil fenilporpirin, asam arakidat dengan dan atau tanpa inisiator,heksatriakantone. Campuran multilapis film (perbandingan molar porpirin : asam arachidic : heksatriakantone, 1,5 : 10, r, dimana r = 0, 0,5) terdiri dari 4, 20 dan 40 lapis berhasil di transfer ke atas kaca preparat sebagai Langmuir Blodgett film dan dilakukan karakterisasi dengan spektroskopi sinar tampak (UV-visible spectroscopy). Luas daerah per molekul porpirin adalah15-21 Å2. Campuran pertama (porpirin : asam arakidat) memberikan multilapisyang baik, sedangkan campuran dengan adanya inisiator tidak menghasilkan 20 dan 40 lapisan seperti prediksi. Beberapa kemungkinan penyebab hasil tidak optimum seperti tingkat kebersihan (cleanliness), kondisi isotermaldan kecepatan kompresi saat pembentukan multilapis film akan di bahas.Kata-kata kunci: Langmuir-Blodgett Films, multilapis, Cu-3,5-bistetrabutyl-phenylporphyrinAbstract. The study of mixed Langmuir-Blodgett Films multilayer was conducted in ordinary experiment conditions by using metallo-porphyrin derivative (3,5-bistetrabutyl-phenylporphyrin with Cu as central metal) andarachidate acid with and without trigger molecule, hexatriacontane. We demonstrated that the mixed multilayer which consist of 4, 20 and 40 layers for each mixed solution (molar ratio porphyrin : arachidic acid :hexatriancontane, 1,5 : 10 : r, where r is 0, 0.5) successfully transfers into glass plates as Langmuir-Blodgett Films and characterized the transferred films using UV visible spectroscopy. The area per monolayer porphyrin moleculeis approximately 15-21 Å2. The first mixed solution (porhyrin: arachidic acid) produced good multilayer while the second mixed solution (porphyrin : arachidic acid : trigger molecule, hexatriancontane) did not produce 20 and 40layers as it was expected. Some possible problems such as cleanliness, isotherms condition and compression speed of forming multilayer will be discussed.Key words:Langmuir-Blodgett Films, multilayer, Cu-3,5-bistetrabutyl phenylporphyrin

Stable Langmuir–Blodgett film deposition of polyaniline and arachidic acid

2007 ◽  
Vol 515 (18) ◽  
pp. 7299-7306 ◽  
Author(s):  
Chun-Wei Chen ◽  
Ju-Hua Yeh ◽  
Ta-Jo Liu
Keyword(s):  
Arachidic Acid ◽  
Film Deposition ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Film

Langmuir-Blodgett Film of a Processable Polydiacetylene with Tricyanovinyldialkylaniline Chromophore

1999 ◽  
Vol 598 ◽  
Author(s):  
D.-C. Lee ◽  
L. Li ◽  
L. A. Samuelson ◽  
D. J. Sandman
Keyword(s):  
Second Harmonic ◽  
Visible Absorption ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Compression Direction ◽  
Ir Studies ◽  
Out Of Plane ◽  
New Strategy ◽  
Uv Visible ◽  
Langmuir Blodgett Film

ABSTRACTA soluble and processable polydiacetylene (PDA) with functionalizable N,N-dialkylaniline and glutamate ester substituted alkylurethane side groups was synthesized. This PDA was further reacted with tetracyanoethylene to effect postpolymerization functionalization. This new strategy further functionalizes conjugated polymers and introduces a tricyanovinyl (TCV)-aniline chromophore. The resulting polymer was soluble in common organic solvents. Asymmetric multilayers of the tricyanovinylated PDA were fabricated using the Langmuir-Blodgett (LB) technique. Thickness, visible absorption, and second harmonic (SH) intensity were found to increase linearly as a function of the number of layers. Polarized UV-visible and IR studies revealed that the main chain preferentially orients vertical to the compression direction with out-of-plane orientation of the TCV-aniline group with respect to the glass substrate. The resonant enhanced second-order nonlinear optical (NLO) coefficient (d33) of the 20 LB layers was found to be 21 pm/V at 1.064 µm, while no SHG signal was observed for cast or spincoated films.

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