Second harmonic generation in alternate non-linear Langmuir-Blodgett films

Ledoux, Isabelle; Josse, D.; Fremaux, P.; Piel, Jean-Philippe; Post, Ginell R.; Zyss, J.; McLean, T.; Hann, R. A.; Gordon, P. F.; Allen, S.

doi:10.1016/0040-6090(88)90065-x

Cited by 55 publications

(9 citation statements)

References 13 publications

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“…12 An essential requirement to exhibit this effect is the formation of an organized noncentrosymmetric structure. 13 For amphi philic organic materials, this can be achieved by the use of the LB technique, allowing the control of the organization of the monolayer precursor at the molecular level. An important advantage of hemicyanine dyes is also the relative simplicity of their chemical modification with a hydrocarbon chain, which imparts to these compounds the amphiphilic properties necessary for the formation of stable Langmuir monolayers at the air−water interface.…”

Section: Introductionmentioning

confidence: 99%

Cation-Controlled Excimer Packing in Langmuir–Blodgett Films of Hemicyanine Amphiphilic Chromoionophores

et al. 2016

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Supramolecular structure of ultrathin films of hemicyanine dye bearing a crown ether group (CrHCR) was tuned by lateral pressure and investigated by means of compression isotherms, UV-vis and fluorescence spectroscopies, and X-ray reflectivity. Two different types of aggregation were revealed, depending on the absence or the presence of metal cations in the water subphase. While CrHCR forms at high surface pressures head-to-tail stacking aggregates on pure water, changing the subphase to a metal-cation-containing one leads to the appearance of well-defined excimers with head-to-head orientation. The structure of monolayers transferred onto solid supports by the Langmuir-Blodgett (LB) technique was examined by use of X-ray reflectivity measurements and molecular modeling. A model of cation-induced excimer formation in hemicyanine Langmuir monolayers is proposed. Finally, fluorescence emission properties of LB films of CrHCR can be managed by appropriate changes in the subphase composition, this last one determining the type of chromophore aggregation.

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Section: Introductionmentioning

confidence: 99%

Cation-Controlled Excimer Packing in Langmuir–Blodgett Films of Hemicyanine Amphiphilic Chromoionophores

et al. 2016

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“…[20] For amphiphilic compounds, this can be done by Langmuir-Blodgett technique, which allows control of the organization of precursor-monolayer on molecular level. In this regard, hemicyanines possess one important advantage: easiness of chemical modification by alkyl substituents, which provide these compounds with amphiphility that is required for formation of stable Langmuir monolayers at air/ water interface.…”

Section: Structural Organization Of Hemicyanine Chromoionophores In Lmentioning

confidence: 99%

Factors Affecting the Structural Organization of Hemicyanine Chromoionophores in Langmuir Monolayers

Shokurov¹,

Silant’yeva²,

Arslanov³

et al. 2016

MHC

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“…The proper combination of strong donoracceptor groups and a large conjugated region usually gives rise to relatively high second-order optical nonlinearity. Table 8 lists second-order nonlinear optical properties of organic LB materials, [121][122][123][124][125][126][127] Details of LB techniques and second-order N L O properties of heterotype LB films have recently been reviewed by Tieke," Nalwa et ul.,"" Okada and Nakanishi.Ilx Organic LB films show second-order optical nonlinearity as high ;is lo-" esu or even higher.…”

Section: Organometallic Lb Films For Nonlinear Opticsmentioning

confidence: 99%

Organometallic Langmuir‐Blodgett films for electronics and photonics

Nalwa

Kakuta

1992

Applied Organom Chemis

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This review provides a brief introduction to the Langmuir-Blodgett (LB) technique and to the utilization of ultrathin films in the fields of electronics and optics. The electrical and nonlinear optical properties of the Langmuir-Blodgett monolayer and multilayers of organoruthenium complexes, ferrocene derivatives, meta1(4,5dimercapto-1,3-dithi01-2-dithiolene)~ complexes, metallophthalocyanines, metalloporphyrins, metal(dibenzotetra-aza[l4]annulene)s and siloxane polymers are presented. Possible applications of organometallic LB films in sensors, electroluminescence and electrochromic devices, optical switches, solar cells, infrared detectors and harmonic generators are discussed.

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Second harmonic generation in alternate non-linear Langmuir-Blodgett films

Cited by 55 publications

References 13 publications

Cation-Controlled Excimer Packing in Langmuir–Blodgett Films of Hemicyanine Amphiphilic Chromoionophores

Cation-Controlled Excimer Packing in Langmuir–Blodgett Films of Hemicyanine Amphiphilic Chromoionophores

Factors Affecting the Structural Organization of Hemicyanine Chromoionophores in Langmuir Monolayers

Organometallic Langmuir‐Blodgett films for electronics and photonics

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