Demonstration of Smartphones as Viable Tools for Adolescent Substance Use Surveillance.

: Electronic platform surveys are ideal for self-administration in adolescent populations, as nearly all adolescents in the US report using or having access to smartphones. This technology-savvy population seems prepared to graduate away from paper surveys. Despite predicted advantages of using smartphones for data collection, there is a surprising lack of data regarding the use of this mode for surveillance of substance use trends among adolescent populations.

Electroluminescent zinc(II) bis(8-hydroxyquinoline): structural effects on electronic states and device performance.

We present direct evidence for stable oligomers in vacuum-deposited thin films of zinc(II) bis(8-hydroxyquinoline) (Znq(2)). The tetramer [(Znq(2))(4)] is the energetically favored configuration in both the single crystal and the vacuum-deposited thin film. Oligomerization leads to distinct, symmetry-driven differences between the electronic states in Znq(2) and those in the archetypal organic electroluminescent molecule tris(8-hydroxyquinoline) aluminum (Alq(3)).