M@C (M = U, Th): Inherent Topological Connectivity Existed in Thermodynamically Stable Isomers and the Possibility of an Endohedral Fullerene Containing One Heptagon Ring.

The density functional theory combined with statistical thermodynamic analyses of M@C (M = U and Th) demonstrated that four isomers, M@(24109)-C, M@(24107)-C, M@(22595)-C, and M@(23349)-C, and a nonclassical isomer, M@(id7)-C, containing one heptagon ring possess outstanding thermodynamic stabilities in the two M@C series. Especially, the M@(id7)-C isomer is the first nonclassical C fullerene that can exist stably. Importantly, these five fullerene cages are found to be related in the form of Stone-Wales (SW) transformations.

Efficiency comparison with fovea-sparing internal limiting membrane peeling and complete internal limiting membrane peeling for treating myopic traction maculopathy.

Purpose: To explore whether the efficacy of fovea-sparing internal limiting membrane peeling (FS-ILMP) is better than that of complete internal limiting membrane peeling (ILMP).

Methods: This retrospective clinical study included 34 cases (34 eyes) with myopic traction maculopathy collected from June 2017 to February 2019. Twenty-three-gauge (23-G) pars plana vitrectomy (23G PPV) was performed on all patients.

Encapsulation of Monometal Uranium into Fullerenes C (2 = 70-74): Important Ionic UC Characters and Covalent U-Cage Bonding Interactions.

By using density functional theory calculations combined with statistical thermodynamic analyses, the stabilization performance of a series of fullerene cages C (2 = 70-74) via encapsulating monometal uranium was systematically and thoroughly investigated. Results indicate that fullerene cages (8149)-C and (14246)-C obeying the isolated pentagon rule and (10612)-C featured with one pentalene moiety were the most promising candidates to encage uranium. Subsequent Mulliken spin density distribution and frontier molecular orbital analyses suggest that four formal electron transfer occurs from monometal U to above the carbon cages.