Isolation and evolution of labile sulfur allotropes via kinetic encapsulation in interactive porous networks.

ABSTRACT: The isolation and characterization of small sulfur allotropes have long remained unachievable because of their extreme lability. This study reports the first direct observation of disulfur (S2) with X-ray crystallography. Sulfur gas was kinetically trapped and frozen into the pores of two Cu-based porous coordination networks containing interactive iodide sites. Stabilization of S2 was achieved either through physisorption or chemisorption on iodide anions. One of the networks displayed shape selectivity for linear molecules only, therefore S2 was trapped and remained stable within the material at room temperature and higher. In the second network, however, the S2 molecules reacted further to produce bent-S3 species as the temperature was increased. Following the thermal evolution of the S

SUBMITTER: Kitagawa H 

PROVIDER: S-EPMC4937778 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature