Anomalous Optoelectronic Properties of Chiral Carbon Nanorings…and One Ring to Rule Them All^23.

ABSTRACT: Carbon nanorings are hoop-shaped, π-conjugated macrocycles that form the fundamental annular segments of single-walled carbon nanotubes (SWNTs). In a very recent report, the structures of chiral carbon nanorings (which may serve as chemical templates for synthesizing chiral nanotubes) were experimentally synthesized and characterized for the first time. Here in our Letter we show that the excited-state properties of these unique chiral nanorings exhibit anomalous and extremely interesting optoelectronic properties with excitation energies growing larger as a function of size (in contradiction with typical quantum confinement effects). Although the first electronic excitation in armchair nanorings is forbidden with a weak oscillator strength, we find that the same excitation in chira

SUBMITTER: Wong BM 

PROVIDER: S-EPMC4047598 | biostudies-literature | 2011 Nov

REPOSITORIES: biostudies-literature