Self-Assembled Spin-Coated and Bulk Films of a Novel Poly(diacetylene) as Second-Order Nonlinear Optical Polymers

Kim, W. H.; Bihari, Bipin; Moody, R. A.; Kodali, N. B.; Kumar, Jitendra; Tripathy, Sukant K.

doi:10.1021/ma00106a033

Cited by 28 publications

(23 citation statements)

References 3 publications

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“…Light induced conformational changes also form the primary step in the mass transport phenomena, observed in the azobenzenic polymeric films. Two independent research groups reported the possibility of obtaining a surface relief grating (SRG) by UV irradiation of a polymer containing azobenzene [5,6]. Until now the mechanisms responsible for the surface material structuring have not been completely elucidated despite the fact that several models have been proposed to account for the photo-induced mass transport [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Until now the mechanisms responsible for the surface material structuring have not been completely elucidated despite the fact that several models have been proposed to account for the photo-induced mass transport [7][8][9][10][11][12][13][14][15]. Different proposed mechanisms assume the driving forces to be the isomerization pressure, the gradient electric force, the asymmetric diffusion, the mean-field forces, or the permittivity gradients [6,[11][12][13][14][15]. Recent studies developed in our research group, allow us to propose a mechanism that can explain the azo-polymers flowing even at temperatures in the range of 30 − 40…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and photochromic behavior of some azo-polysiloxanes modified with nucleobases or donor-acceptor groups

Enea¹,

Resmeriță²,

Petraru

et al. 2007

Open Chemistry

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This paper presents the syntheses, characterization and photochromic behavior of some new azo-polysiloxanes modified with uracil, cytosine or nitro-phenolic groups. Taking into consideration the possibility of generating H-bonds or donor/acceptor interactions, this class of materials present a potential applicability in the immobilization of biomolecules and their nano-manipulations. Also, such compounds are capable of producing a fluid phase, with directional flowing capacity. For all these polymers, the molecular modeling simulations have shown disordered structures, which would generate amorphous phases, a very important aspect for molecules' nano-manipulation. The photochromic behavior in the presence of UV irradiation was also evaluated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and photochromic behavior of some azo-polysiloxanes modified with nucleobases or donor-acceptor groups

Enea¹,

Resmeriță²,

Petraru

et al. 2007

Open Chemistry

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show abstract

“…In general, this group has been used for intercalation (Lacroix et al 1994), inclusion (Cox et al 1990), selfassembly (Li et al 1990;Kim et al 1995), Langmuir-Blodgett film (Popovitz-Biro et al 1988;Bosshard et al 1990;McCullough and Regen 2004) and hybrid material (Jiang and Kakkar 1998;Jiang and Kakkar 1999).…”

Section: Introductionmentioning

confidence: 99%

NLO polymers based on cellulose diacetate and a cationic chromophore

Zhou

2006

Cellulose

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An attempt has been made to prepare second-order nonlinear optic (NLO) materials based on cellulose diacetate and melamine derivatives. The NLO cationic chromophore, composed of 1,3-dimethyl-2-(4¢-N,N-dimethylaminophenyl)-azo-imidazole chloride and small amounts of 1,3-dimethyl-2-(4¢-N,N-dimethylaminophenyl)-azo-imidazole methylsulfate, was incorporated into a crosslink network formed from the reaction of cellulose diacetate with trimethylol melamine or hexamethylol melamine. The poled and cured NLO materials exhibited an electro-optic coefficient (r 13 ) of 1.03 or 1.42 pm/V, respectively, at the laser wavelength 1550 nm and a modulation frequency of 12.7 kHz; the r 13 values decreased to 97% or 86.6%, respectively, of the initial values after 4 days. The laser transmission loss was 0.58 or 0.6 dB, respectively. The crosslinked materials showed better temporal stability than the material of the host/ guest system with a doped cationic chromophore. The results of Fourier transform infrared spectroscopy, dielectric relaxation and thermogravimetry analyses proved the formation of a crosslink structure, and the degree of dielectric relaxation was shown to became higher if a crosslinker of too high functionality was used.

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“…The chromophores containing anionic groups could be used in the way of intercalation (14), inclusion (15) or self-assembly (16,17).…”

Section: Introductionmentioning

confidence: 99%

NLO Polymers Containing Anionic Chromophore

Zhou

Xü

Wang

2005

Journal of Macromolecular Science, Part A

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Preparation of second order nonlinear optic (NLO) materials based on cellulose diacetate and melamine derivatives was tried. The NLO chromophore sodium [4 0 -(N, N-dihydroxyethyl) amino] phenyl-4-azo-benzene sulfonate incorporated into the crosslinking network resulted from cellulose diacetate and trimethylolmelamine or hexamethylolmelamine. The poled and cured NLO materials exhibited the electrooptic coefficient r 13 of 1.72 pm/V or 1.15 pm/V at the laser wavelength of 1550 nm, modulation frequency of 12.7 kHz, and the r 13 value decreased to 71.5% or 81.5% of the initial values after 4 days. The laser transmission loss was 0.94 dB or 1.76 dB. The crosslinking materials showed better temporal stability than the material of the host/guest type. The results of FTIR, dielectric relaxation, and TGA proved the formation of the crosslinking structure and that the dielectric relaxation was suppressed by higher crosslinking density.

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Self-Assembled Spin-Coated and Bulk Films of a Novel Poly(diacetylene) as Second-Order Nonlinear Optical Polymers

Cited by 28 publications

References 3 publications

Synthesis and photochromic behavior of some azo-polysiloxanes modified with nucleobases or donor-acceptor groups

Synthesis and photochromic behavior of some azo-polysiloxanes modified with nucleobases or donor-acceptor groups

NLO polymers based on cellulose diacetate and a cationic chromophore

NLO Polymers Containing Anionic Chromophore

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