The role of intermediate nonluminescent states in the relaxation of singlet excitons in the conjugated polymer poly~phenylene vinylene! ~PPV! and its soluble derivative poly@(2-methoxy-5-hexyloxy-p-phenylene) vinylene# ~MH-PPV! is investigated. Time-resolved luminescence and absorption measurements provide evidence for a long-lived, weakly emissive species in PPV at 17 K, in addition to the lum...

The resonant Raman and UV/vis absorption spectra of two diradicaloïd compounds, methyl viologen and phenylene-extended viologen in their neutral state, have been simulated using multiconfigurational wavefunction methods. For methyl viologen, a good agreement with experiment is evidenced for the UV/vis absorption vibronic structure, provided dynamic correlation is accounted for to get the vibrat...

Highly luminescent inclusion complexes consisting of poly(para-phenylene) (PPP) or poly(4,4'-diphenylene-vinylene) (PDV) in the helical cavity of amylose have been synthesised, structurally characterised by nuclear Overhauser spectroscopy and used to fabricate electroluminescent light-emitting diodes.

We map the location of emitting sites within a single conjugated polymer molecule poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] with nanometre accuracy by means of a single-molecule imaging technique.

A chemical-responsive bis(m-phenylene)-32-crown-10/2,7-diazapyrenium salt [2]pseudorotaxane was prepared. It was found to form a supramolecular poly[2]pseudorotaxane in the solid state driven by π-π stacking interactions.

Novel phosphorescent conjugated oligo(phenylene-ethynylene)s featuring a central tunable platinum(II) Schiff base signalling unit with promising photophysical properties have been investigated to pave their development towards polymeric congeners for sensing applications.

A novel pentiptycene-based bis(crown ether) host incorporating two dibenzo-24-crown-8 ether moieties has been synthesized, and its efficient complexation ability toward cyclobis(paraquat-p-phenylene) in solution and in the solid state has been explored.