Condensed concepts

In discussions of emergence, particularly in chemistry, isomers are often given as an example of an emergent phenomenon. In Anderson's o...

John Clarke, Michel H. Devoret, and John M. Martinis received the prize  “for the discovery of macroscopic quantum mechanical tunnelling an...

It is important to be clear what the system is. Most of chemistry is not really about isolated molecules. A significant amount of chemistry ...

Carbonic anhydrase is a common enzyme that performs many different physiological functions including maintaining acid-base equilibria. It i...

The challenge of understanding phase transitions and proton ordering in hydrogen-bonded ferroelectrics (such as KDP, squaric acid, croconic...

On Friday I am giving a talk in the Chemistry Department at Berkeley. Here is the current version of the slides. There is some interestin...

Chemical Reviews just published an article Nuclear Quantum Effects in Water and Aqueous Systems: Experiment, Theory, and Current Challeng...

In a molecule one can observe excitation by infra-red photons of overtones of vibrational modes, i.e. if nu is the fundamental vibrational f...

Sharon Hammes-Schiffer gave an interesting talk in Telluride last week about coupled electron-proton transfer. [A couple of my earlier post...

I am skeptical of the grand and speculative claims of "quantum biology".  There is a nice paper in PNAS which systematically cons...

Tomorrow I am giving a talk, "Competing quantum effects in hydrogen bonding: geometric isotope effects and isotope fractionation" ...

I am currently in Telluride for a meeting on Quantum effects in condensed phase systems . Two years ago I attended a similar meeting and in ...

Physical Chemistry Chemical Physics  has just published a series of four articles by Jeff Reimers, Laura McKemmish, Noel Hush , and myself. ...

I have just finished a paper with Bijyalaxmi Athokpam and Sai  Ramesh, Isotopic fractionation in proteins as a measure of hydrogen bond len...

Last October I enjoyed attending a meeting,  Water: the most anomalous liquid  at NORDITA. One of the goals of the workshop was to produce a...

Yesterday, Matthew Woolley gave an interesting Quantum science seminar at UQ about some of his recent work on Photon assisted tunnelling wi...

A number of proteins involve short strong hydrogen bonds [also known as low-barrier bonds] and there is considerable debate about how import...

A previous post focused on quantum effects largely associated with hydrogen bonding associated with the O-H stretch vibration. Here, I consi...

Many properties of bulk water, including its many anomalous properties , can be described/understood in terms of the classical dynamics of i...

There is a nice paper Tautomerism in Porphycenes: Analysis of Rate-Affecting Factors Piotr Ciąćka, Piotr Fita, Arkadiusz Listkowski, Micha...