1
|
Debrie C, Coudert N, Guigner JM, Nicolai T, Stoffelbach F, Colombani O, Rieger J. Unimer Exchange Is not Necessary for Morphological Transitions in Polymerization-Induced Self-Assembly. Angew Chem Int Ed Engl 2023; 62:e202215134. [PMID: 36541924 PMCID: PMC10107197 DOI: 10.1002/anie.202215134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
Polymerization-induced self-assembly (PISA) has established itself as a powerful and straightforward method to produce polymeric nano-objects of various morphologies in (aqueous) solution. Generally, spheres are formed in the early stages of polymerization that may evolve to higher order morphologies (worms or vesicles), as the solvophobic block grows during polymerization. Hitherto, the mechanisms involved in these morphological transitions during PISA are still not well understood. Combining a systematic study of a representative PISA system with rheological measurements, we demonstrate that-unexpectedly-unimer exchange is not necessary to form higher order morphologies during radical RAFT-mediated PISA. Instead, in the investigated aqueous PISA, the monomer present in the polymerization medium is responsible for the morphological transitions, even though it slows down unimer exchange.
Collapse
Affiliation(s)
- Clément Debrie
- Sorbonne Université & CNRS (UMR 8232), Institut Parisien de Chimie Moléculaire (IPCM), Polymer Chemistry Team, 4 Place Jussieu, 75252, Paris Cedex 05, France
| | - Noémie Coudert
- Le Mans Université & CNRS (UMR 6283), Institut des Molécules et Matériaux du Mans (IMMM), Avenue Olivier Messiaen, 72085, Le Mans Cedex 9, France
| | - Jean-Michel Guigner
- Sorbonne Université &CNRS, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590-IRD-MNHN, 75252, Paris Cedex 05, France
| | - Taco Nicolai
- Le Mans Université & CNRS (UMR 6283), Institut des Molécules et Matériaux du Mans (IMMM), Avenue Olivier Messiaen, 72085, Le Mans Cedex 9, France
| | - François Stoffelbach
- Sorbonne Université & CNRS (UMR 8232), Institut Parisien de Chimie Moléculaire (IPCM), Polymer Chemistry Team, 4 Place Jussieu, 75252, Paris Cedex 05, France
| | - Olivier Colombani
- Le Mans Université & CNRS (UMR 6283), Institut des Molécules et Matériaux du Mans (IMMM), Avenue Olivier Messiaen, 72085, Le Mans Cedex 9, France
| | - Jutta Rieger
- Sorbonne Université & CNRS (UMR 8232), Institut Parisien de Chimie Moléculaire (IPCM), Polymer Chemistry Team, 4 Place Jussieu, 75252, Paris Cedex 05, France
| |
Collapse
|
2
|
Debrie C, Coudert N, Guigner JM, Nicolai T, Stoffelbach F, Colombani O, Rieger J. Unimer Exchange is not Necessary for Morphological Transitions in Polymerization Induced Self‐Assembly. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202215134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Clément Debrie
- IPCM: Institut Parisien de Chimie Moleculaire Chemistry Department FRANCE
| | - Noémie Coudert
- IMMM: Institut des Molecules et Materiaux du Mans Le Mans Université FRANCE
| | - Jean-Michel Guigner
- IMPMC: Institut de Mineralogie de Physique des Materiaux et de Cosmochimie Department of Physics FRANCE
| | - Taco Nicolai
- IMMM: Institut des Molecules et Materiaux du Mans Le Mans Université FRANCE
| | | | - Olivier Colombani
- IMMM: Institut des Molecules et Materiaux du Mans Le Mans Université FRANCE
| | - Jutta Rieger
- IPCM: Institut Parisien de Chimie Moleculaire Université Pierre et Marie Curie UPMC CNRS UMR7610 4 Place Jussieu 75252 PARIS FRANCE
| |
Collapse
|
3
|
Coudert N, Debrie C, Rieger J, Nicolai T, Colombani O. Thermosensitive Hydrogels of BAB Triblock Copolymers Exhibiting Gradually Slower Exchange Dynamics and an Unexpected Critical Reorganization Temperature Upon Heating. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Noémie Coudert
- Institut des Molécules et Matériaux du Mans (IMMM), UMR 6283 CNRS Le Mans Université, Avenue Olivier Messiaen, 72085Le Mans Cedex 9, France
| | - Clément Debrie
- Institut Parisien de Chimie Moléculaire (IPCM), Polymer Chemistry Team, Sorbonne Université, CNRS, UMR 8232, 4 Place Jussieu, 75252Paris Cedex 05, France
| | - Jutta Rieger
- Institut Parisien de Chimie Moléculaire (IPCM), Polymer Chemistry Team, Sorbonne Université, CNRS, UMR 8232, 4 Place Jussieu, 75252Paris Cedex 05, France
| | - Taco Nicolai
- Institut des Molécules et Matériaux du Mans (IMMM), UMR 6283 CNRS Le Mans Université, Avenue Olivier Messiaen, 72085Le Mans Cedex 9, France
| | - Olivier Colombani
- Institut des Molécules et Matériaux du Mans (IMMM), UMR 6283 CNRS Le Mans Université, Avenue Olivier Messiaen, 72085Le Mans Cedex 9, France
| |
Collapse
|
4
|
Ndiokwelu E, Miquel JL, Coudert N. Identification of victims of catastrophes: introduction to the role of forensic odontology. Odontostomatol Trop 2003; 26:33-6. [PMID: 15074076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
There are many ways of identifying victims of catastrophes but in disasters where most soft tissue has been lost, the hard tissues of teeth can be used. This article describes the important role that forensic odontology can play in these cases. This role has not been recognised in most countries, particularly developing countries, where forensic odontology has been restricted to legal affairs.
Collapse
Affiliation(s)
- E Ndiokwelu
- College of Medicine, Enugu Campus, University of Nigeria
| | | | | |
Collapse
|