|
1
|
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.
Collapse
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
| |
Collapse
|
|
3
|
Fra̧ckowiak D, Ion RM, Waszkowiak A. Spectral Properties of Phthalocyanines Oriented in Stretched Polymer Films. J Phys Chem B 2002. [DOI: 10.1021/jp0212592] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Danuta Fra̧ckowiak
- Institute of Physics, Faculty of Technical Physics, Poznań University of Technology, Nieszawska 13A,60 965 Poznań, Poland, and ICECHIM Chemical Analysis Department, Splaiul Independentei 202, Bucharest-77208 Romania
| | - Rodica-Mariana Ion
- Institute of Physics, Faculty of Technical Physics, Poznań University of Technology, Nieszawska 13A,60 965 Poznań, Poland, and ICECHIM Chemical Analysis Department, Splaiul Independentei 202, Bucharest-77208 Romania
| | - Aneta Waszkowiak
- Institute of Physics, Faculty of Technical Physics, Poznań University of Technology, Nieszawska 13A,60 965 Poznań, Poland, and ICECHIM Chemical Analysis Department, Splaiul Independentei 202, Bucharest-77208 Romania
| |
Collapse
|
|
4
|
Stomphorst RG, van der Zwan G, van Zandvoort MAMJ, Sieval AB, Zuilhof H, Vergeldt FJ, Schaafsma TJ. Spectroscopic Study of Erythrosin B in PVA Films. J Phys Chem A 2001. [DOI: 10.1021/jp0041813] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Regien G. Stomphorst
- Molecular Physics Group, Department of Biomolecular Sciences, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands, Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Debye Institute, Department of Molecular Biophysics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenlaan 8, 6703 HB Wageningen, The Netherlands
| | - Gert van der Zwan
- Molecular Physics Group, Department of Biomolecular Sciences, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands, Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Debye Institute, Department of Molecular Biophysics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenlaan 8, 6703 HB Wageningen, The Netherlands
| | - Marc A. M. J. van Zandvoort
- Molecular Physics Group, Department of Biomolecular Sciences, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands, Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Debye Institute, Department of Molecular Biophysics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenlaan 8, 6703 HB Wageningen, The Netherlands
| | - Alexander B. Sieval
- Molecular Physics Group, Department of Biomolecular Sciences, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands, Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Debye Institute, Department of Molecular Biophysics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenlaan 8, 6703 HB Wageningen, The Netherlands
| | - Han Zuilhof
- Molecular Physics Group, Department of Biomolecular Sciences, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands, Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Debye Institute, Department of Molecular Biophysics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenlaan 8, 6703 HB Wageningen, The Netherlands
| | - Frank J. Vergeldt
- Molecular Physics Group, Department of Biomolecular Sciences, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands, Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Debye Institute, Department of Molecular Biophysics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenlaan 8, 6703 HB Wageningen, The Netherlands
| | - Tjeerd J. Schaafsma
- Molecular Physics Group, Department of Biomolecular Sciences, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands, Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Debye Institute, Department of Molecular Biophysics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenlaan 8, 6703 HB Wageningen, The Netherlands
| |
Collapse
|