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Azzedine Bousseksou (born 2 December 1964) is a Franco-Algerian physical chemist known for his contributions to molecular materials and spintronics.
Azzedine Bousseksou received his diploma in Material Physics from the Université de Bab Ezzouar in Algiers, in 1983, his Diplôme d'études approfondies (DEA) in Materials Science from the University of Nantes, in 1988, and his PhD in Materials Science from Pierre and Marie Curie University in Paris, in 1992. His doctoral internship was at the Inorganic Chemistry Laboratory of Johannes Gutenberg University of Mainz. [1]
Bousseksou began his career as a research fellow at the French National Centre for Scientific Research (CNRS) Coordination Chemistry Laboratory in Toulouse, in 1993. [1] [2] In January 2003, while in charge of Research at the LCC-CNRS Toulouse, he created and directed the scientific team "Switchable Molecular Materials". [3] From 2005 and 2009, he also directed the GDR Magnétisme et Commutation Moléculaires and co-coordinated the GDRI France-Japan on multifunctional molecular materials between 2006-2010. Between 2011 and 2013, he was Deputy Director of the LCC-CNRS Toulouse and has been Director since 2013 [4] . Azzedine Bousseksou was a member of the CNRS national committee for the evaluation of researchers and research laboratories from 2000 to 2004 and 2010 to 2015 and has coordinated and/or led several European, national, and regional projects. He has been a member of the European Network of Excellence on Molecular Magnetism, REX MAGMANET, [5] and is a member of the European Institute on Molecular Magnetism (EIMM).
He and his team developed three complementary conceptual approaches, which include:
With his research team is made up of 3 other permanent staff members (Gabor Molnar, DR-CNRS, Lionel Salmon DR-CNRS and William Nicolazzi, MCF-Université Paul Sabatier), among his achievements are the following:
He has supervised about twenty post-doctoral students and more than thirty theses.
He has registered 12 patents, 2 of which are being exploited, and one startup in incubation.
He is a founding member of the Algerian Academy of Sciences and Technologies (2015), as well as a member of the French Academy of Sciences (2013), [27] the European Academy of Sciences and Arts (2012) and the European Academy of sciences (2014).
Ferroelectricity is a characteristic of certain materials that have a spontaneous electric polarization that can be reversed by the application of an external electric field. All ferroelectrics are also piezoelectric and pyroelectric, with the additional property that their natural electrical polarization is reversible. The term is used in analogy to ferromagnetism, in which a material exhibits a permanent magnetic moment. Ferromagnetism was already known when ferroelectricity was discovered in 1920 in Rochelle salt by Joseph Valasek. Thus, the prefix ferro, meaning iron, was used to describe the property despite the fact that most ferroelectric materials do not contain iron. Materials that are both ferroelectric and ferromagnetic are known as multiferroics.
In chemistry, photoisomerization is a form of isomerization induced by photoexcitation. Both reversible and irreversible photoisomerizations are known for photoswitchable compounds. The term "photoisomerization" usually, however, refers to a reversible process.
Molecular machines are a class of molecules typically described as an assembly of a discrete number of molecular components intended to produce mechanical movements in response to specific stimuli, mimicking macromolecular devices such as switches and motors. Naturally occurring or biological molecular machines are responsible for vital living processes such as DNA replication and ATP synthesis. Kinesins and ribosomes are examples of molecular machines, and they often take the form of multi-protein complexes. For the last several decades, scientists have attempted, with varying degrees of success, to miniaturize machines found in the macroscopic world. The first example of an artificial molecular machine (AMM) was reported in 1994, featuring a rotaxane with a ring and two different possible binding sites. In 2016 the Nobel Prize in Chemistry was awarded to Jean-Pierre Sauvage, Sir J. Fraser Stoddart, and Bernard L. Feringa for the design and synthesis of molecular machines.
A single-molecule magnet (SMM) is a metal-organic compound that has superparamagnetic behavior below a certain blocking temperature at the molecular scale. In this temperature range, an SMM exhibits magnetic hysteresis of purely molecular origin. In contrast to conventional bulk magnets and molecule-based magnets, collective long-range magnetic ordering of magnetic moments is not necessary.
Vanadium(IV) oxide or vanadium dioxide is an inorganic compound with the formula VO2. It is a dark blue solid. Vanadium(IV) dioxide is amphoteric, dissolving in non-oxidising acids to give the blue vanadyl ion, [VO]2+ and in alkali to give the brown [V4O9]2− ion, or at high pH [VO4]4−. VO2 has a phase transition very close to room temperature (~68 °C (341 K)). Electrical resistivity, opacity, etc, can change up several orders. Owing to these properties, it has been used in surface coating, sensors, and imaging. Potential applications include use in memory devices, phase-change switches, passive radiative cooling applications, such as smart windows and roofs, that cool or warm depending on temperature, aerospace communication systems and neuromorphic computing. It occurs in nature, as the mineral, Paramontroseite.
Pierre Braunstein is a French chemist. He was director of the Laboratoire de Chimie de Coordination of Strasbourg (France) and is a member of the French Academy of Science.
In chemistry and physics, LIESST is a method of changing the electronic spin state of a compound by means of irradiation with light.
Peter Philip Edwards FRSC FRS is a British Emeritus Professor of Inorganic Chemistry and former Head of Inorganic Chemistry at the University of Oxford and a Fellow of St Catherine's College, Oxford. Edwards is the recipient of the Corday-Morgan Medal (1985), the Tilden Lectureship (1993–94) and Liversidge Award (1999) of the Royal Society of Chemistry. He was elected a Fellow of the Royal Society in 1996 and was awarded the 2003 Hughes Medal of the Royal Society "for his distinguished work as a solid state chemist. He has made seminal contributions to fields including superconductivity and the behaviour of metal nanoparticles, and has greatly advanced our understanding of the phenomenology of the metal-insulator transition". In 2009 Edwards was elected to the German Academy of Sciences Leopoldina, and he was elected Einstein Professor for 2011 by the Chinese Academy of Sciences. In 2012 he was awarded the Bakerian Lecture by the Royal Society "in recognition of decisive contributions to the physics, chemistry and materials science of condensed matter, including work on the metal-insulator transition". In the spring of 2012 he was elected International Member of the American Philosophical Society; one of only four people from the UK in that year to be awarded this honour across all subjects and disciplines. Later in 2012 he was awarded the Worshipful Company of Armourers and Brasiers Materials Science Venture Prize for his work on new, low-cost, high-performance conducting oxide coatings for solar cells and optoelectronic materials. In the Autumn of 2013 he was elected Member of Academia Europaea, and he was elected as a Foreign Honorary Member of the American Academy of Arts and Sciences in 2014.
Spin crossover (SCO) is a phenomenon that occurs in some metal complexes wherein the spin state of the complex changes due to an external stimulus. The stimuli can include temperature or pressure. Spin crossover is sometimes referred to as spin transition or spin equilibrium behavior. The change in spin state usually involves interchange of low spin (LS) and high spin (HS) configuration.
Guy Bertrand, born on July 17, 1952, at Limoges is a chemistry professor at the University of California, San Diego.
Didier Astruc carried out his studies in chemistry in Rennes. After a Ph. D. with professor R. Dabard in organometallic chemistry, he did post-doctoral studies with professor R. R. Schrock at the Massachusetts Institute of Technology Cambridge, Massachusetts, in the U.S. and later a sabbatical year with professor K. P. C. Vollhardt at the University of California at Berkeley. He became a CNRS Director of research in Rennes, then in 1983 full Professor of Chemistry at the University Bordeaux 1. He is known for his work on electron-reservoir complexes and dendritic molecular batteries, catalytic processes using nanoreactors and molecular recognition using gold nanoparticles and metallodendrimers.
Marie-Paule Pileni is a French physical chemist who was born in Tananarive, Madagascar. She is an Emeritus Professor at Sorbonne University and a Senior Member, since 1999, and administrator (2004–2011) of the Institut Universitaire de France.
Low molecular-mass organic gelators (LMOGs) are the monomeric sub-unit which form self-assembled fibrillar networks (SAFINs) that entrap solvent between the strands. SAFINs arise from the formation of strong non-covalent interactions between LMOG monomeric sub-units. As SAFINs are forming, the long fibers become intertwined and trap solvent molecules. Once solvent molecules are entrapped within the network, they are immobilized by surface tension effects. The stability of a gel is dependent on the equilibrium between the assembled network and the dissolved gelators. One characteristic of an LMOG, that demonstrates its stability, is its ability to contain an organic solvent at the boiling point of that solvent due to extensive solvent-fibrillar interactions. Gels self-assemble through non-covalent interactions such as π-stacking, hydrogen-bonding, or Van der Waals interactions to form volume-filling 3D networks. Self-assembly is key to gel formation and dependent upon reversible bond formation. The propensity of a low molecular weight molecule to form LMOGs is classified by its Minimum Gelation Concentration (MGC). The MGC is the lowest possible gelator concentration needed to form a stable gel. A lower MGC is desired to minimize the amount of gelator material needed to form gels. Super gelators have a MGC of less than 1 wt%.
Ayyappanpillai Ajayaghosh is a research scientist/academician in the domain of interdisciplinary chemistry, and the former Director of the National Institute for Interdisciplinary Science and Technology. He is known for his studies on supramolecular assemblies, organogels, photoresponsive materials, chemosensory and security materials systems and is an elected fellow of all the three major Indian science academies viz. the National Academy of Sciences, India, Indian National Science Academy and the Indian Academy of Sciences as well as The World Academy of Sciences. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards for his contributions to Chemical Sciences in 2007. He is the first chemist to receive the Infosys Science Prize for physical sciences, awarded by the Infosys Science Foundation. He received the TWAS Prize of The World Academy of Sciences in 2013 and the Goyal prize in 2019.
Singlet fission is a spin-allowed process, unique to molecular photophysics, whereby one singlet excited state is converted into two triplet states. The phenomenon has been observed in molecular crystals, aggregates, disordered thin films, and covalently-linked dimers, where the chromophores are oriented such that the electronic coupling between singlet and the double triplet states is large. Being spin allowed, the process can occur very rapidly and out-compete radiative decay thereby producing two triplets with very high efficiency. The process is distinct from intersystem crossing, in that singlet fission does not involve a spin flip, but is mediated by two triplets coupled into an overall singlet. It has been proposed that singlet fission in organic photovoltaic devices could improve the photoconversion efficiencies.
Paolo Samorì is an Italian physical chemist and Distinguished Professor (PRCE) at the Institut de Science et d'Ingénierie Supramoléculaires (ISIS) of the Université de Strasbourg (UNISTRA) & CNRS where he heads the Nanochemistry Laboratory and he has been institute director (2012-2023).
Jean-Marie Tarascon FRSC is Professor of Chemistry at the Collège de France in Paris and Director of the French Research Network on Electrochemical Energy Storage (RS2E).
OctaDist is computer software for crystallography and inorganic chemistry program. It is mainly used for computing distortion parameters of coordination complex such as spin crossover complex (SCO), magnetic metal complex and metal–organic framework (MOF).
Lynda Soderholm is a physical chemist at the U.S. Department of Energy's (DOE) Argonne National Laboratory with a specialty in f-block elements. She is a senior scientist and the lead of the Actinide, Geochemistry & Separation Sciences Theme within Argonne's Chemical Sciences and Engineering Division. Her specific role is the Separation Science group leader within Heavy Element Chemistry and Separation Science (HESS), directing basic research focused on low-energy methods for isolating lanthanide and actinide elements from complex mixtures. She has made fundamental contributions to understanding f-block chemistry and characterizing f-block elements.
Richard Eric Parry Winpenny FRSC FLSW is a British chemist and a professor in the Department of Chemistry at the University of Manchester. Winpenny's research is within the fields of inorganic chemistry and magnetochemistry, specifically the areas of single-molecule magnetism, inorganic synthesis, supramolecular chemistry and polymetallic caged complexes.
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