Task-specific ionic liquids synthesized in silica by the sol-gel method. Characterization and application to model reactions: Esterification and transesterification
Ionic liquids (ILs) have unique properties that make them attractive to be used as catalysts in numerous reactions, although their separation and recovery from the reaction media use to be challenging. Thus, it is possible to add value to ILs from a technological point of view, by immobilizing them...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Next Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949822824001874 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849773506077655040 |
|---|---|
| author | María B. Martini Valeria Palermo Gustavo P. Romanelli Claudia G. Adam |
| author_facet | María B. Martini Valeria Palermo Gustavo P. Romanelli Claudia G. Adam |
| author_sort | María B. Martini |
| collection | DOAJ |
| description | Ionic liquids (ILs) have unique properties that make them attractive to be used as catalysts in numerous reactions, although their separation and recovery from the reaction media use to be challenging. Thus, it is possible to add value to ILs from a technological point of view, by immobilizing them in solid materials and maintaining their specific catalytic properties. This work reports the catalytic behavior of a new class of 'task-specific ionic liquids' (TSILs) that are encapsulated inside the pores of silica particles synthesized through the sol-gel method. The 1-(4-sulfonic acid)-butyl-3-methylimidazolium ([bsmim]) and 1-(4-sulfonic acid)-butyl-imidazolium ([bsHim]) with bisulphate as the counterion were supported, obtaining bsmim@S and bsHim@S. Both materials were characterized and tested as heterogeneous catalysts in the transesterification of p-nitrophenyl acetate with methanol and in the esterification of acetic acid with isoamyl alcohol. In both studied reactions the developed supported materials (TSILs@S) were capable to achieve product yields similar to those of homogeneous systems. Differently to the unsupported homogeneous TSIL, which only in a few cases can be separated by transfer of the product to a different phase, separation and recovery of TSILs@S can be easily performed. These advantages allow the design of ecological solvent-free processes that use recyclable heterogeneous catalysts and low temperatures. |
| format | Article |
| id | doaj-art-7a23510c7b904183a4042e67b2eceaff |
| institution | DOAJ |
| issn | 2949-8228 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Next Materials |
| spelling | doaj-art-7a23510c7b904183a4042e67b2eceaff2025-08-20T03:02:02ZengElsevierNext Materials2949-82282025-01-01610029010.1016/j.nxmate.2024.100290Task-specific ionic liquids synthesized in silica by the sol-gel method. Characterization and application to model reactions: Esterification and transesterificationMaría B. Martini0Valeria Palermo1Gustavo P. Romanelli2Claudia G. Adam3Instituto de Química Aplicada del Litoral (IQAL, UNL-CONICET) and Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santa Fe, Santiago del Estero 2829(3000), ArgentinaCentro de Investigación y Desarrollo en Ciencias Aplicadas “Dr. Jorge J. Ronco” (CINDECA-CCT La Plata-CONICET-CIC-PBA) Universidad Nacional de La Plata Calle 47 No 257, B1900AJK La Plata, ArgentinaCentro de Investigación y Desarrollo en Ciencias Aplicadas “Dr. Jorge J. Ronco” (CINDECA-CCT La Plata-CONICET-CIC-PBA) Universidad Nacional de La Plata Calle 47 No 257, B1900AJK La Plata, ArgentinaInstituto de Química Aplicada del Litoral (IQAL, UNL-CONICET) and Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santa Fe, Santiago del Estero 2829(3000), Argentina; Corresponding author.Ionic liquids (ILs) have unique properties that make them attractive to be used as catalysts in numerous reactions, although their separation and recovery from the reaction media use to be challenging. Thus, it is possible to add value to ILs from a technological point of view, by immobilizing them in solid materials and maintaining their specific catalytic properties. This work reports the catalytic behavior of a new class of 'task-specific ionic liquids' (TSILs) that are encapsulated inside the pores of silica particles synthesized through the sol-gel method. The 1-(4-sulfonic acid)-butyl-3-methylimidazolium ([bsmim]) and 1-(4-sulfonic acid)-butyl-imidazolium ([bsHim]) with bisulphate as the counterion were supported, obtaining bsmim@S and bsHim@S. Both materials were characterized and tested as heterogeneous catalysts in the transesterification of p-nitrophenyl acetate with methanol and in the esterification of acetic acid with isoamyl alcohol. In both studied reactions the developed supported materials (TSILs@S) were capable to achieve product yields similar to those of homogeneous systems. Differently to the unsupported homogeneous TSIL, which only in a few cases can be separated by transfer of the product to a different phase, separation and recovery of TSILs@S can be easily performed. These advantages allow the design of ecological solvent-free processes that use recyclable heterogeneous catalysts and low temperatures.http://www.sciencedirect.com/science/article/pii/S2949822824001874EsterificationIonic liquidsSol-gelSupported ionic liquidsTransesterification |
| spellingShingle | María B. Martini Valeria Palermo Gustavo P. Romanelli Claudia G. Adam Task-specific ionic liquids synthesized in silica by the sol-gel method. Characterization and application to model reactions: Esterification and transesterification Next Materials Esterification Ionic liquids Sol-gel Supported ionic liquids Transesterification |
| title | Task-specific ionic liquids synthesized in silica by the sol-gel method. Characterization and application to model reactions: Esterification and transesterification |
| title_full | Task-specific ionic liquids synthesized in silica by the sol-gel method. Characterization and application to model reactions: Esterification and transesterification |
| title_fullStr | Task-specific ionic liquids synthesized in silica by the sol-gel method. Characterization and application to model reactions: Esterification and transesterification |
| title_full_unstemmed | Task-specific ionic liquids synthesized in silica by the sol-gel method. Characterization and application to model reactions: Esterification and transesterification |
| title_short | Task-specific ionic liquids synthesized in silica by the sol-gel method. Characterization and application to model reactions: Esterification and transesterification |
| title_sort | task specific ionic liquids synthesized in silica by the sol gel method characterization and application to model reactions esterification and transesterification |
| topic | Esterification Ionic liquids Sol-gel Supported ionic liquids Transesterification |
| url | http://www.sciencedirect.com/science/article/pii/S2949822824001874 |
| work_keys_str_mv | AT mariabmartini taskspecificionicliquidssynthesizedinsilicabythesolgelmethodcharacterizationandapplicationtomodelreactionsesterificationandtransesterification AT valeriapalermo taskspecificionicliquidssynthesizedinsilicabythesolgelmethodcharacterizationandapplicationtomodelreactionsesterificationandtransesterification AT gustavopromanelli taskspecificionicliquidssynthesizedinsilicabythesolgelmethodcharacterizationandapplicationtomodelreactionsesterificationandtransesterification AT claudiagadam taskspecificionicliquidssynthesizedinsilicabythesolgelmethodcharacterizationandapplicationtomodelreactionsesterificationandtransesterification |