Collisional energy removal rates from vibrationally excited T$\sb1$ pyrazine are measured using the refined and validated Competitive Radiationless Decay (CRD) method. Optical excitation followed by intersystem crossing ...

A fundamental and long-standing question surrounds the mechanism of primary bond cleavage in azoalkanes: do the two C-N bonds break in a synchronous or a stepwise manner? When a vapor phase azoalkane absorbs near ultraviolet ...

A study is presented of the photophysics of a variety of fullerene derivatives, including C60O, C70O, C120, 1,2-C70 H2, Kr C60, and four mono-substituted benzo-adducts of C70. Measured photophysical properties include ...

In the first application of a new method for determining this information, rates of collisional vibrational energy removal have been measured for the T$\sb1$ state of pyrazine with vibrational energy contents ranging from ...

Terahertz time-domain spectroscopy (THz-TDS) is a powerful non-contact optical technique for characterizing materials and sub-picosecond dynamic behavior in the far-infrared region (100 GHz --- 10 THz) of the electromagnetic ...

We present a study of the ground and triplet state properties of C$\sb{60}$O. UV-vis spectroscopy and a gravimetric analysis are used to produce a quantitative electronic absorption spectrum. Spectrofluorimetry reveals ...

Existing growth methods produce single-walled carbon nanotubes (SWCNTs) with a range of structures and electronic properties, but many potential applications require pure nanotube samples. Density gradient ultracentrifugation ...

Photoluminescence spectroscopy has emerged as a powerful technique for characterizing the structure and optical properties of single-walled carbon nanotubes (SWCNT). While SWCNT diameter and chirality information is now ...

A fundamental question in the chemistry of azoalkanes concerns the nature of their primary bond cleavage: do the two C-N bonds break in a synchronous or a sequential fashion? The photodissociation of an acyclic, unsymmetrical ...

In the first use of the Raman effect to detect sulfur atoms, transient CARS spectroscopy has revealed novel relaxation effects in sulfur formed through multiple photon excitation of carbon disulfide vapor. Ground term ...