A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs. The stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding. For many molecules, the sharing of electrons allows each atom to attain the equivalent of a full valence shell, corresponding to a stable electronic configuration. In organic chemistry, covalent bonding is much more common than ionic bonding.
In chemistry, a superatom is any cluster of atoms that seem to exhibit some of the properties of elemental atoms.
Cadmium selenide is an inorganic compound with the formula CdSe. It is a black to red-black solid that is classified as a II-VI semiconductor of the n-type. It is a pigment but applications are declining because of environmental concerns
Car–Parrinello molecular dynamics or CPMD refers to either a method used in molecular dynamics or the computational chemistry software package used to implement this method.
A molecular sensor or chemosensor is a molecular structure that is used for sensing of an analyte to produce a detectable change or a signal. The action of a chemosensor, relies on an interaction occurring at the molecular level, usually involves the continuous monitoring of the activity of a chemical species in a given matrix such as solution, air, blood, tissue, waste effluents, drinking water, etc. The application of chemosensors is referred to as chemosensing, which is a form of molecular recognition. All chemosensors are designed to contain a signalling moiety and a recognition moiety, that is connected either directly to each other or through a some kind of connector or a spacer. The signalling is often optically based electromagnetic radiation, giving rise to changes in either the ultraviolet and visible absorption or the emission properties of the sensors. Chemosensors may also be electrochemically based. Small molecule sensors are related to chemosensors. These are traditionally, however, considered as being structurally simple molecules and reflect the need to form chelating molecules for complexing ions in analytical chemistry. Chemosensors are synthetic analogues of biosensors, the difference being that biosensors incorporate biological receptors such as antibodies, aptamers or large biopolymers.
Harry Barkus Gray is the Arnold O. Beckman Professor of Chemistry at California Institute of Technology.
Quantum biology is the study of applications of quantum mechanics and theoretical chemistry to aspects of biology that cannot be accurately described by the classical laws of physics. An understanding of fundamental quantum interactions is important because they determine the properties of the next level of organization in biological systems.
Louis Edward Brus is an American chemist, and currently the Samuel Latham Mitchell Professor of Chemistry at Columbia University. He is the co-discoverer of the colloidal semi-conductor nanocrystals known as quantum dots. In 2023, he was awarded the Nobel Prize in Chemistry.
Daniel George Nocera is an American chemist, currently the Patterson Rockwood Professor of Energy in the Department of Chemistry and Chemical Biology at Harvard University. He is a member of the National Academy of Sciences and the American Academy of Arts and Sciences. In 2006 he was described as a "major force in the field of inorganic photochemistry and photophysics". Time magazine included him in its 2009 list of the 100 most influential people.
Michelle C. Y. Chang is a Professor of Chemistry and Chemical and Biomolecular Engineering at the University of California, Berkeley, and is a recipient of several young scientist awards for her research in biosynthesis of biofuels and pharmaceuticals.
Christopher J. Chang is a professor of chemistry and of molecular and cell biology at the University of California, Berkeley, where he holds the Class of 1942 Chair. Chang is also a member of the Helen Wills Neuroscience Institute, a Howard Hughes Medical Institute investigator, adjunct professor of pharmaceutical chemistry at the University of California, San Francisco, and faculty scientist at the chemical sciences division of Lawrence Berkeley Lab. He is the recipient of several awards for his research in bioinorganic chemistry, molecular and chemical biology.
Sharon Hammes-Schiffer is a physical chemist who has contributed to theoretical and computational chemistry. She is currently a Sterling Professor of Chemistry at Yale University. She has served as senior editor and deputy editor of the Journal of Physical Chemistry and advisory editor for Theoretical Chemistry Accounts. As of 1 January 2015 she is editor-in-chief of Chemical Reviews.
Water oxidation catalysis (WOC) is the acceleration (catalysis) of the conversion of water into oxygen and protons:
Jenny Yue-fon Yang is an American chemist. She is a Professor of chemistry at the University of California, Irvine where she leads a research group focused on inorganic chemistry, catalysis, and solar fuels.
Brandi Michelle Cossairt is an American chemist specializing in synthetic inorganic and materials chemistry. She is the Lloyd E. and Florence M. West Endowed Professor of Chemistry at University of Washington.
Sandra J. Rosenthal is the Jack and Pamela Egan Professor of Chemistry, professor of physics and astronomy, pharmacology, chemical and biomolecular engineering, and materials science at Vanderbilt University. She is a joint faculty member at Oak Ridge National Laboratory in the Materials Science and Technology Division and the director of the Vanderbilt Institute of Nanoscale Science and Engineering.
David Nathan Beratan is an American chemist and physicist, the R.J. Reynolds Professor of Chemistry at Duke University. He has secondary appointments in the departments of Physics and Biochemistry. He is the director of the Center for Synthesizing Quantum Coherence, a NSF Phase I Center for Chemical Innovation.
Daniel Kwabena Dakwa Bediako is a Ghanaian-British chemist. He is currently assistant professor at the University of California, Berkeley, and is the Cupola Era Professor in the college of chemistry. His research considers charge transport and interfacial charge transfer in two-dimensional materials and heterostructures. He is also a member of the Editorial Advisory Board of the Journal of the American Chemical Society (JACS).
R. David Britt is the Winston Ko Chair and Distinguished Professor of Chemistry at the University of California, Davis. Britt uses electron paramagnetic resonance (EPR) spectroscopy to study metalloenzymes and enzymes containing organic radicals in their active sites. Britt is the recipient of multiple awards for his research, including the Bioinorganic Chemistry Award in 2019 and the Bruker Prize in 2015 from the Royal Society of Chemistry. He has received a Gold Medal from the International EPR Society (2014), and the Zavoisky Award from the Kazan Scientific Center of the Russian Academy of Sciences (2018). He is a Fellow of the American Association for the Advancement of Science and of the Royal Society of Chemistry.
Silicon quantum dots are metal-free biologically compatible quantum dots with photoluminescence emission maxima that are tunable through the visible to near-infrared spectral regions. These quantum dots have unique properties arising from their indirect band gap, including long-lived luminescent excited-states and large Stokes shifts. A variety of disproportionation, pyrolysis, and solution protocols have been used to prepare silicon quantum dots, however it is important to note that some solution-based protocols for preparing luminescent silicon quantum dots actually yield carbon quantum dots instead of the reported silicon. The unique properties of silicon quantum dots lend themselves to an array of potential applications: biological imaging, luminescent solar concentrators, light emitting diodes, sensors, and lithium-ion battery anodes.
