Doubly linked chiral phenanthrene oligomers for homogeneously π-extended helicenes with {large|big|huge|massive|substantial|significant} {effective|efficient|successful|powerful|productive|helpful} conjugation length

Helically twisted conductive nanocarbon {materials|supplies|components} are applicable to optoelectronic and electromagnetic molecular devices {working|operating|functioning} {on the|around the} nanometer scale. Herein, we report the synthesis of per-peri-perbenzo- and helicenes {in addition…

A manipulative activity for exploring {effective|efficient|successful|powerful|productive|helpful} nuclear charge (Zeff)

High-school and undergraduate college students {may|might|could|may possibly|may well|may perhaps} {often|frequently|usually|typically|generally|normally} {rely on|depend on} memorization when {learning|studying|understanding|finding out|mastering} periodic trends, {leading|top|major} to an ineffective understanding of introductory chemistry {concepts|ideas} like atomic…