𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Non-equilibrium structures and geometry relaxation in polyoctylthiophene

✍ Scribed by G. Zerbi; L. Castellani; B. Chierichetti; C. Gallazzi; O. Ingänas

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
347 KB
Volume
172
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

From a previous published spectroscopic analysis we know that a solid sample of polyoctyl-(and polyhexyl-) thiophene is a two-phase system characterized by the coexistence of an ordered (0) and of a disordered (D) structure. We show here that by time-temperature studies at low temperature the sample becomes richer in the 0 structure which is again lost (but not fully) when the sample is brought back to room temperature. The possible origin of such relaxation phenomena is discussed. The information relevant for material science is that the physical properties of this material as now prepared are not yet the limiting ones sought for in technology,

📜 SIMILAR VOLUMES

Non-equilibrium shear relaxation in liqu
Non-equilibrium shear relaxation in liquids
✍ N.D. Gershon 📂 Article 📅 1974 🏛 Elsevier Science 🌐 English ⚖ 255 KB

A theory for non-equilibrium shear relaxation in liquids at low frequencies is presented. It is based on molecular considerations used in theories of low frequency depolarized light scattering. The results for the complex shear impedance contain terms in addition to those obtained by the phenomenol

Optimization of equilibrium geometries a
Optimization of equilibrium geometries and transition structures
✍ H. Bernhard Schlegel 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 528 KB

## Abstract A modified conjugate gradient algorithm for geometry optimization is outlined for use with __ab initio__ MO methods. Since the computation time for analytical energy gradients is approximately the same as for the energy, the optimization algorithm evaluates and utilizes the gradients ea

Relaxation of a non-equilibrium rotation
Relaxation of a non-equilibrium rotational distribution in HCl
✍ L.P. Roodhart; G.H. Wegdam 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 395 KB

A mixture of IO\% pressure SF6 snd HCI gas is subjected to P( 16)-COz iaser radiation. The ensuing iiuorescent sigafs from the WCI vibration and ground-stste rota?ions axe spectroscopic&y resolved and their tmnsisnt behaviour is measured. The fluorescent sign& are used to monitor the coliisionally i

Effects of non-equilibrium solvation dyn
Effects of non-equilibrium solvation dynamics on barrierless electronic relaxation in solution
✍ Biman Bagchi 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 437 KB

The effects of non-equilibrium solvation dynamics on zero-barrier photoisomerization reactions are studied theoretically. A theory based on general considerations is presented. A two-state model for the time dependence of the sink function is introduced and solved analytically for the survival proba