Star-shaped donor-acceptor molecules are full of promise for organic photovoltaics and electronics. However, the effect branching core on physicochemical properties, charge transport photovoltaic performance such materials in single-component (SC) bulk heterojunction (BHJ) solar cells has not been thoroughly addressed. This work shows comprehensive investigation six star-shaped with terminal he...

The nature of the primary photoexcitations in semiconducting single-walled carbon nanotubes (S-SWCNTs) is of strong current interest. We have studied the emission spectra of S-SWCNTs and two different π-conjugated polymers in solutions and films, and have also performed ultrafast pump-probe spectroscopy on these systems. The emission spectra relative to the absorption bands are very similar in ...

Covalent organic framework (COF) is an outstanding manifesto for heterogeneous photocatalysis. Herein, we synthesized a pyrene-based two-dimensional C=C linked π-conjugated COF via Knoevenagel condensation and anchored Ni(II)-center through bipyridine moieties....

Homoconjugation occurs when two aromatic rings are separated by a single non-conjugated atom. This is demonstrated in triptycene the through-space overlap of π-clouds aryl fins and can be used to enhance optoelectronic properties.

This work presents first-principles calculations of long-range intermolecular dispersion energies between two atoms or molecules and of electronic circular dichroism spectra of chiral molecules. The former is expressed in terms of the C6 dipoledipole dispersion coefficients and the latter is given in terms of the extinction coefficient ∆ǫ. In a series of publications, the complex linear polariz...

Photoinitiated charge separation (CS) and recombination (CR) in a series of donor-bridge-acceptor (D-B-A) molecules with cross-conjugated, linearly conjugated, and saturated bridges have been compared and contrasted using time-resolved spectroscopy. The photoexcited charge transfer state of 3,5-dimethyl-4-(9-anthracenyl)julolidine (DMJ-An) is the donor, and naphthalene-1,8:4,5-bis(dicarboximide...

A series of new ladder π-conjugated materials, phosphole modified pentathienoacene (PO-PTA), are synthesized and characterized. Single-crystal X-ray results demonstrate that methyl-disubstituted PO-PTA forms a face-to-face dimer structure driven by π-π interactions. The investigations of optical properties showed that the oxidized phosphole moiety in this ladder system can effectively narrow th...