Here is reported the synthesis of a family thiophene-based heptamers alternating electron donor (D) and acceptor (A) units in D–A?–D–A–D–A?–D sequence. Their multiple roles as active materials BHJ solar cells are presented.

Solar cells based on p-conjugated donor-acceptor (D-A) organic molecular systems are a promising alternative to conventional electrical energy generation. D-A systems, which have triphenylamine (TPA) moiety linked with benzothiadiazole (BTD) moiety, open the potential development of new small molecule donors for bulk heterojunction (BHJ) solar cells. Here, series donor-acceptor-π-acceptor (D-A-...

Electronic communication uncovered between donor groups in a pair of D–A–D TADF emitters lowers their triplet energies, and shows that they cannot be described purely as combinations the equivalent D–A systems.

The effect of substituents in the aniline donor and type heterocyclic acceptor/donor moieties on yields 1,2-trans- 1,1-isomer ethylene D-π-A chromophores Pd-catalyzed Heck reaction has been studied. Various – derivatives quinoline, quinoxaline, benzothiazole, carbazole indolizine were synthesized.

purpose: to determine the long-term visual outcomes and complications of penetrating keratoplasty (pk) performed for keratoconus. methods: hospital records of patients with keratoconus who underwent pk at the ophthalmology center of shaheed sadoughi, yazd, iran, during 1992-2003 were reviewed. we studied records of 84 pk procedures in 72 keratoconus patients. data including best corrected visua...

A comprehensive study was conducted to determine the effect of donor-group on solid-state organization and electronic properties stimuli-responsive benzothiadiazole-based D–A–D building blocks.

Two triarylimidazole organic dyes with an auxiliary donor (D–D–?–A) and accepter (D–A–?–A) were reported. The ?-spacer has significant role on physico-chemical photovoltaic performance of the [Cu(dmp) 2 ] 1+/2+ redox couples.

Acridones have found their role in luminescent materials for OLEDs. Most interestingly, showing potential as weak charge transfer thermally activated delayed fluorescence (TADF) emitters, providing narrow photoluminescence. In this work, we present a comprehensive study of donor-acceptor-donor (D-A-D) acridone-amine derivatives TADF and UV electrochromic properties. Structure-property relations...

A series of Schiff Bases of Ni(II) and Cu(II) using acetylacetone (acac), salicylaldehyde (sal), ethylenediamine (en), and o-phenylendiarnine (dabe) were prepared and characterized. The electronic spectra of some copper chelates in various organic solvents depend strongly on the solvent used and the d-d band of Cu(II) shifts to red with the increase of the Donor Number (DN) of solvent. The ...

a series of schiff bases of ni(ii) and cu(ii) using acetylacetone (acac), salicylaldehyde (sal), ethylenediamine (en), and o-phenylendiarnine (dabe) were prepared and characterized. the electronic spectra of some copper chelates in various organic solvents depend strongly on the solvent used and the d-d band of cu(ii) shifts to red with the increase of the donor number (dn) of solvent. the colo...