1. Chemical Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA 94720
2. Current address: School of Chemistry, Cantock's Close, University of Bristol, Bristol BS8 ITS, United Kingdom
3. Current address: Naval Research Laboratory, Code 6876,4555 Overlook Avenue SW, Washington DC 20375
4. Corresponding authors (e-mail: AGSuits@lbl.gov and Osv.Pms@pop.ioffe.rssi.ru)
5. Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia