A new class of three dimensional D–π–A trigonal cryptand derivatives for second-order nonlinear optics

2002 ◽  
Vol 12 (8) ◽  
pp. 2237-2244 ◽  
Author(s):  
Pritam Mukhopadhyay ◽  
Parimal K. Bharadwaj ◽  
G. Savitha ◽  
Anu Krishnan ◽  
Puspendu K. Das
Keyword(s):  
Nonlinear Optics ◽  
Three Dimensional ◽  
Second Order ◽  
New Class

A New Class of Organic−Inorganic Sol−Gel Materials for Second-Order Nonlinear Optics

1997 ◽  
Vol 9 (4) ◽  
pp. 883-888 ◽  
Author(s):  
Ging-Ho Hsiue ◽  
Rong-Ho Lee ◽  
Ru-Jong Jeng
Keyword(s):  
Nonlinear Optics ◽  
Sol Gel ◽  
Second Order ◽  
New Class

Thermally Stable Polyimides for Second-Order Nonlinear Optics

1995 ◽  
Vol 413 ◽  
Author(s):  
J. I. Chen ◽  
L. Li ◽  
S. Marturunkakul ◽  
J. Kumar ◽  
S. K. Tripathy ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Nonlinear Optical ◽  
Second Order ◽  
Thermally Stable ◽  
New Class

ABSTRACTA new class of nonlinear optical (NLO) polyimides incorporating a thermally stable chromophore has been synthesized and characterized. These polymers exhibit large and extremely

Novel Organic Sol-Gel Materials For Second-Order Nonlinear Optics

1993 ◽  
Vol 328 ◽  
Author(s):  
R. J. Jeng ◽  
G. H. Hsiue ◽  
J. I. Chen ◽  
S. Marturunkakul ◽  
L. Li ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Nonlinear Optical ◽  
Sol Gel ◽  
Optical Nonlinearity ◽  
Second Order ◽  
New Class ◽  
Nlo Materials

ABSTRACTA new class of organic sol-gel second-order nonlinear optical (NLO) Materials based on hexa (Methoxymethyl) Melamine has been investigated. NLO active chromophores, 4- (4′-nitrophenylazo) aniline and 4-amino-4′-nitrobiphenyl, were incorporated into the Melamine Matrices. Samples exhibit second-order optical nonlinearity after poling and curing at 220 °C for 30 Min. The synthesis, preparation, and characterization of these materials are reported.

Polyimide/Norganic Composite - Interpenetrating Polymer Network For Stable Second-Order Nonlinear Optics

1993 ◽  
Vol 328 ◽  
Author(s):  
Sutiyao Marturunkakul ◽  
Jeng-I Chen ◽  
Lian Li ◽  
Xin Li Jiang ◽  
Ru Jong Jeng ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Polymer Network ◽  
Temporal Stability ◽  
Second Order ◽  
Interpenetrating Polymer Network ◽  
Processing Conditions ◽  
New Class

ABSTRACTA new class of IPN system has been prepared and investigated. This IPN system combines the polybismaleinimide network and the NLO-active phenoxysilicon network. The second-order NLO coefficients, d33, values of the samples range from 2.5 to 6.7 pm/V depending on the composition and the processing conditions. The temporal stability of the second-order nonlinearities for these samples at 110 °C varies from 47 to 88 % retention after 274 h.

A Peptoid with Extended Shape in Water

2019 ◽  
Author(s):  
Jumpei Morimoto ◽  
Yasuhiro Fukuda ◽  
Takumu Watanabe ◽  
Daisuke Kuroda ◽  
Kouhei Tsumoto ◽  
...  
Keyword(s):  
Spectroscopic Analysis ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Biomolecular Recognition ◽  
Biological Application ◽  
New Class ◽  
Proteolytic Resistance ◽  
Pharmacokinetic Properties ◽  
Optically Pure ◽  
Three Dimensional Space

<div> <div> <div> <p>“Peptoids” was proposed, over decades ago, as a term describing analogs of peptides that exhibit better physicochemical and pharmacokinetic properties than peptides. Oligo-(N-substituted glycines) (oligo-NSG) was previously proposed as a peptoid due to its high proteolytic resistance and membrane permeability. However, oligo-NSG is conformationally flexible and is difficult to achieve a defined shape in water. This conformational flexibility is severely limiting biological application of oligo-NSG. Here, we propose oligo-(N-substituted alanines) (oligo-NSA) as a new peptoid that forms a defined shape in water. A synthetic method established in this study enabled the first isolation and conformational study of optically pure oligo-NSA. Computational simulations, crystallographic studies and spectroscopic analysis demonstrated the well-defined extended shape of oligo-NSA realized by backbone steric effects. The new class of peptoid achieves the constrained conformation without any assistance of N-substituents and serves as an ideal scaffold for displaying functional groups in well-defined three-dimensional space, which leads to effective biomolecular recognition. </p> </div> </div> </div>

SYNTHESIS OF BROADBAND DISTRIBUTED IMPEDANCE TRANSFORMERS WITH A GIVEN PHASE RESPONSE

2018 ◽  
pp. 40-47
Author(s):  
D. I. Volkhin ◽  
G. N. Devyatkov
Keyword(s):  
Transmission Lines ◽  
Conversion Coefficient ◽  
Power Conversion ◽  
Response Characteristic ◽  
Second Order ◽  
Phase Response ◽  
Synthesis Process ◽  
New Class ◽  
Broadband Matching ◽  
Active Impedance

The development of a new class of broadband matching devices, including active impedance transformers, with the possibility of correcting the phase response is an actual task at present. Synthesis of a broadband active impedance transformer with a phase response corresponding to a second-order lattice X-section in a distributed elemental basis based on the previously presented method for the synthesis of broadband matching devices with predetermined phase response is considered in this paper. As a result of synthesis, the y-matrix of the broadband transforming two-port network is obtained. The functions of its own parameters represented in the form of Foster. Applying various conditions of circuit realizability in the synthesis process, we obtained structures convenient for realization on microwave on regular transmission lines, one of which is investigated at various parameters of a given phase response. As a result of the research, it is found that the structure has a wide ability to reproduce the phase response of a second-order lattice X-section with different parameters, and also reproduce the linear phase response characteristic while maintaining an acceptable level of the power conversion coefficient in a given frequency band. Thus, the efficiency of the previously proposed method of synthesis of broadband matching devices with predetermined phase response is demonstrated, and also the possibilities of active impedance transformers on regular transmission lines are shown.

scholarly journals Fixed point theorems via Generalized WF-Contractions with applications

SeMA Journal ◽  
2021 ◽  
Author(s):  
Rosana Rodríguez-López ◽  
Rakesh Tiwari
Keyword(s):  
Fixed Point ◽  
Differential Equations ◽  
Boundary Value Problem ◽  
Fixed Point Theorems ◽  
Boundary Value ◽  
Second Order ◽  
Point Boundary ◽  
New Class ◽  
Second Order Differential Equations ◽  
Fixed Point Result

AbstractThe aim of this paper is to introduce a new class of mixed contractions which allow to revise and generalize some results obtained in [6] by R. Gubran, W. M. Alfaqih and M. Imdad. We also provide an example corresponding to this class of mappings and show how the new fixed point result relates to the above-mentioned result in [6]. Further, we present an application to the solvability of a two-point boundary value problem for second order differential equations.

Synthesis and Solution Aggregation Studies of a Suite of Mixed Neutral and Zwitterionic Chromophores for Second-Order Nonlinear Optics

2014 ◽  
Vol 79 (21) ◽  
pp. 10153-10169 ◽  
Author(s):  
Victoria Peddie ◽  
Jack Anderson ◽  
Joanne E. Harvey ◽  
Gerald J. Smith ◽  
Andrew Kay
Keyword(s):  
Nonlinear Optics ◽  
Second Order ◽  
Solution Aggregation

Polyamides alternately substituted with an aliphatic cyclic moiety and an NLO-phore for second-order nonlinear optics

1998 ◽  
Vol 199 (8) ◽  
pp. 1465-1471 ◽  
Author(s):  
Fusae Miyata ◽  
Nobukatsu Nemoto ◽  
Yu Nagase ◽  
Jiro Abe ◽  
Makoto Hasegawa ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Second Order
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