Probing forster and dexter energy-transfer mechanisms in fluorescent conjugated polymer chemosensors

Article Abstract:

Fluorescence quenching in solutions of a pendant-functionalized conjugated polymer chemosensor (ttp-PPETE) is evaluated in the presence of a variety of transition metal cations, including Ni(super 2+), Co(super 2+), Cu(super 2+), Fe(super 2+), and Cr(super 6+) is presented. Photophysical characterization for ttp-PPETE includes absorbance, emission, and single-photon counting lifetimes in the absence and presence of varying concentrations of the analytes.

Analysis, Usage, Cations, Photochemistry

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Fabrication and replication of polymer integrated optical devices using electron-beam lithography and soft lithography

Article Abstract:

A miniature Mach-Zehnder interferometer modulator is made to demonstrate the possibility of soft lithography fabricated active polymer devices. It is suggested that the application of combining the electron-beam lithography and soft lithography techniques improves the fabrication throughput, decreases the fabrication cost, and ensures the high-resolution requirement of polymeric integrated optical devices for practical applications.

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First principle treatments on site-and size-dependent supermolecular interactions and nonlinear optical properties of polymer of 2-methyl-4-nitroaniline

Article Abstract:

The supermolecular interactions, electronic absorption spectra, and dynamic second order nonlinear optical polarizabilities beta of pi stacking and hydrogen bonded dimers and a trimer in a 2-methyl-4-nitroaniline crystal are studied. It is observed that the slipped cofacial arrangements of dimer have larger contributions to the electronic absorption spectrum and nonlinear optical response of MNA crystal.

Spectra

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