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de Souza RF, Zannoni C. Rotational diffusion of shape switching particles in nematic liquid crystals. Phys Rev E 2017; 94:062702. [PMID: 28085296 DOI: 10.1103/physreve.94.062702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Indexed: 11/07/2022]
Abstract
The theory of rotational diffusion of particles of various symmetry embedded in a liquid crystal host, essential to interpret a variety of spectroscopic observables, has been available for some time, but only for the case of rigid molecules. Here we generalize the treatment and present a theory to describe the rotational diffusion of shape-changing particles dispersed in nematic liquid crystals. The interaction of the particles with the environment is modeled by an effective field potential, while the particles are allowed to assume an arbitrary discrete number of shapes. The transition between shapes is modeled by a Markovian process which is combined with rotational diffusion. Our model is applied to the simple case of a particle that can exchange between three shapes: a rod, a disk, and a sphere. We consider in detail the effect of shape transitions in some selected correlation functions which are relevant for experiments.
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Affiliation(s)
- R F de Souza
- Dipartimento di Chimica Industriale "Toso Montanari" and INSTM, Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy.,CAPES Foundation, Ministry of Education of Brazil, Brasília, DF 70040-020, Brazil
| | - C Zannoni
- Dipartimento di Chimica Industriale "Toso Montanari" and INSTM, Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
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Bacchiocchi C, Hennebicq E, Orlandi S, Muccioli L, Beljonne D, Zannoni C. "Reduced" Distributed Monopole Model for the Efficient Prediction of Energy Transfer in Condensed Phases. J Phys Chem B 2008; 112:1752-60. [DOI: 10.1021/jp076732w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Corrado Bacchiocchi
- Dipartimento di Chimica Fisica e Inorganica and INSTM, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Laboratory for Chemistry of Novel Materials and Center for Research in Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, and School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
| | - Emmanuelle Hennebicq
- Dipartimento di Chimica Fisica e Inorganica and INSTM, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Laboratory for Chemistry of Novel Materials and Center for Research in Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, and School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
| | - Silvia Orlandi
- Dipartimento di Chimica Fisica e Inorganica and INSTM, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Laboratory for Chemistry of Novel Materials and Center for Research in Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, and School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
| | - Luca Muccioli
- Dipartimento di Chimica Fisica e Inorganica and INSTM, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Laboratory for Chemistry of Novel Materials and Center for Research in Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, and School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
| | - David Beljonne
- Dipartimento di Chimica Fisica e Inorganica and INSTM, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Laboratory for Chemistry of Novel Materials and Center for Research in Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, and School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
| | - Claudio Zannoni
- Dipartimento di Chimica Fisica e Inorganica and INSTM, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Laboratory for Chemistry of Novel Materials and Center for Research in Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, and School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
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