scholarly journals Design, Synthesis, and Structural and Spectroscopic Studies of Push–Pull Two-Photon Absorbing Chromophores with Acceptor Groups of Varying Strength

2013 ◽  
Vol 78 (3) ◽  
pp. 1014-1025 ◽  
Author(s):  
Alma R. Morales ◽  
Andrew Frazer ◽  
Adam W. Woodward ◽  
Hyo-Yang Ahn-White ◽  
Alexandr Fonari ◽  
...  
Keyword(s):  
Spectroscopic Studies ◽  
Design Synthesis ◽  
Two Photon

Femtosecond Spectroscopic Studies of the One- and Two-Photon Excited-State Dynamics of 2,2,17,17-Tetramethyloctadeca-5,9,13-trien-3,7,11,15-tetrayne:  A Trimeric Oligodiacetylene

2006 ◽  
Vol 110 (40) ◽  
pp. 11435-11439 ◽  
Author(s):  
Grzegorz M. Balkowski ◽  
Michiel Groeneveld ◽  
Hong Zhang ◽  
Cindy C. J. Hendrikx ◽  
Michael Polhuis ◽  
...  
Keyword(s):  
Excited State ◽  
Spectroscopic Studies ◽  
Excited State Dynamics ◽  
Two Photon ◽  
The One

The Construction of New Proteins. II. Design, Synthesis and Conformational Studies of Folding Units with βαβ-Topology

1986 ◽  
Vol 41 (10) ◽  
pp. 1315-1322 ◽  
Author(s):  
Manfred Mutter ◽  
Karl-Heinz Altmann ◽  
Thomas Vorherr
Keyword(s):  
Solid Phase ◽  
Three Dimensional ◽  
Chemical Properties ◽  
Spectroscopic Studies ◽  
General Concept ◽  
Dimensional Structure ◽  
Design Synthesis ◽  
Phase Synthesis ◽  
Conformational Studies ◽  
Conformational Effects

The design, synthesis and preliminary conformational studies of two polypeptides exhibiting βαβ-type folding topologies are presented. In the design of the model peptides the general concept for the construction of new proteins developed in the preceeding paper was applied. According to this strategy, amphiphilic helices and β-sheets are linked together via hydrophilic loops to attain three-dimensional structures of higher order (‘supersecondary structures’). Com­puter-assisted molecular modelling served as a valuable tool for minimizing conformational con­straints within the molecules. The 38-residue peptide MI was synthesized using polyethylene glycol (PEG) as solubilizing polymeric support (‘Liquid-Phase synthesis'). Conformationally in­duced changes in the physico-chemical properties of the growing peptide chain stressed the significance of conformational effects in peptide synthesis reported earlier. Similar observations were made during the solid-phase synthesis of the 35-peptide MII. CD and IR spectroscopic studies revealed a high degree of secondary structure for both folding units. The present data strongly support the adoption of a three-dimensional structure for both models.

Amphiphilic Glycoconjugated Porphyrin Heterodimers as Two-Photon Excitable Photosensitizers: Design, Synthesis, Photophysical and Photobiological Studies

2018 ◽  
Vol 3 (6) ◽  
pp. 1887-1897 ◽  
Author(s):  
Su Chen ◽  
Florent Poyer ◽  
Guillaume Garcia ◽  
Céline Fiorini-Debuisschert ◽  
Véronique Rosilio ◽  
...  
Keyword(s):  
Design Synthesis ◽  
Two Photon

scholarly journals Photoconductive Multiplexing by ZnO:Zr:F Thin Solid Films

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
C. Torres-Torres ◽  
L. Castañeda ◽  
R. Torres-Martínez
Keyword(s):  
Nonlinear Optical ◽  
Laser System ◽  
Optical Nonlinearity ◽  
Spectroscopic Studies ◽  
Photon Absorption ◽  
Zno Films ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Two Wave Mixing ◽  
Mixing Method

Within this work, the nonlinear optical properties and electrical effects exhibited by zinc oxide thin films codoped with zirconium and fluorine are reported. The development of a simple photoconductive multiplexor system is proposed. The samples were prepared by the ultrasonic spraying technique (UST). Spectroscopic studies and a vectorial two-wave mixing method were carried out with a nanosecond Nd:YAG laser system at 532 nm. Experimental results indicate that after the zirconium and fluorine doping, a strong third-order optical nonlinearity can be developed in the ZnO films. The nonlinear optical response seems to be dominantly originated by a two-photon absorption closely related to a photoconductive phenomenon.

Design, synthesis, and characterization of new organic dendrimers with greatly enhanced two-photon absorption

2003 ◽  
Author(s):  
Charles W. Spangler ◽  
Zhiyong Suo ◽  
Mikhail A. Drobizhev ◽  
Aliaksandr Karotki ◽  
Aleksander Rebane
Keyword(s):  
Photon Absorption ◽  
Synthesis And Characterization ◽  
Design Synthesis ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals Photodissociation branching ratios of 13C16O and 12C18O in the vacuum ultraviolet region from 107 800 to 109 700 cm−1

2020 ◽  
Vol 637 ◽  
pp. A37 ◽  
Author(s):  
Xiaoping Chi ◽  
Pan Jiang ◽  
Qihe Zhu ◽  
Min Cheng ◽  
Hong Gao
Keyword(s):  
Vacuum Ultraviolet ◽  
Isotope Effects ◽  
Branching Ratio ◽  
Branching Ratios ◽  
Spectroscopic Studies ◽  
Ultraviolet Region ◽  
Velocity Map Imaging ◽  
Absorption Bands ◽  
Two Photon ◽  
O Isotope

In this study, we present C+ ion photofragment spectroscopic studies and photodissociation branching ratio measurements for two CO isotopologs, 13C16O and 12C18O, in the vacuum ultraviolet (VUV) region from 107 800 cm−1 (92.76 nm) to 109 700 cm−1 (91.16 nm) using a time-slice velocity-map imaging setup and a tunable VUV laser radiation source generated by the two-photon resonance-enhanced four-wave mixing technique. Several absorption bands of 12C16O in the above energy region are reinvestigated up to higher rotational levels compared with previous studies. The results are compared among 12C16O, 13C16O, and 12C18O on a state-by-state basis, and the photodissociation branching ratios for channels C(1D) + O(3P), and C(3P) + O(1D) are dramatically changed for most of the absorption bands due to the substitutions of 12C by 13C and 16O by 18O. The branching ratios of 13C16O and 12C18O are close to each other due to their similar reduced masses. The strong and selective isotope effects obtained here not only provide useful information for understanding the complicated predissociation dynamics of CO, but are also important for developing a comprehensive photochemical model for explaining the C and O isotope heterogeneities as observed in the Solar System.

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