resumo
The term Catalysis was first coined in the 19th century and has since been recognized as a fundamental field contributing to the greenness and sustainability of chemical processes. This inspiring field has many wonders. A discovery of the 21st century is reaction-controlled or reaction-induced self-separating (RISS) metal -based catalytic systems, essentially based on coordination compounds, which combine features of the two hemispheres of Catalysis, i.e. homogeneous and het-erogeneous catalysis. Specifically, RISS catalytic systems involve homogeneous catalysis with facilitated mass transfer phenomena, and catalyst self-precipitation under ambient conditions, enabling its easy separation and reuse, without requiring energy intensive downstream processes (e.g., cooling bellow ambient temper-ature or use of precipitation agents to separate metal catalysts). This review discusses the wonders of RISS metal-based catalytic systems and their application in important chemical transformations, how these systems operate (e.g., factors triggering the transition between homogeneous and heterogeneous catalytic features), the types of soluble active metal species formed, and relevant aspects from a practical point of view, such as catalyst recovery yield and reuse. Gaps are identified which merit future research and innovation.
palavras-chave
CONTROLLED PHASE-TRANSFER; TRIAZOLYLMOLYBDENUM(VI) OXIDE HYBRIDS; EPOXIDIZED METHYL OLEATE; HYDROGEN-PEROXIDE; SELECTIVE OXIDATION; OLEFIN EPOXIDATION; BENZYL ALCOHOL; RECYCLABLE CATALYST; GLUTARIC ACID; IONIC LIQUIDS
categoria
Chemistry
autores
Neves, P; Gomes, DM; Gonçalves, IS; Pillinger, M; Valente, AA
nossos autores
Anabela Tavares Aguiar Valente
Investigador Principal
Isabel Maria de Sousa Gonçalves
Professor associado
Martyn Pillinger
Investigador Principal
Patrícia dos Santos Neves
Investigador AuxiliarProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
This work was developed within the scope of the project CICECO- Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MCTES (PIDDAC) , and the COMPETE 2020 Operational Thematic Program for Competitiveness and Internationalization (POCI-01-0145-FEDER- 030075) , co -financed by national funds through the FCT/MCTES (Ministerio da Educacao e Ciencia) and the European Union through the European Regional Development Fund under the Portugal 2020 Part- nership Agreement. D.M.G. (grant ref. 2021.04756.BD) acknowledges the FCT for a PhD grant (State Budget, European Social Fund (ESF) within the framework of Portugal 2020, namely through the Centro 2020 Regional Operational Program) . The authors are grateful to re- searchers who contributed to the topic of this review, and to the scien- tific collaborators who coauthored original articles of RISS systems with some of the coauthors of this review.