Studien über 2.4-Dinitro-α-naphthol

2,4-Dinitro-1-naphthol

In the title compound, C(10)H(6)N(2)O(5), the two fused rings are almost co-planar, with an r.m.s. deviation of 0.0163 Å. The nitro groups are oriented at dihedral angles of 2.62 (11) and 44.69 (11)° with respect to the plane of the parent fused rings. Intra-molecular O-H⋯O and C-H⋯O hydrogen bonds complete S(6) ring motifs. In the crystal, mol-ecules are linked into chains along [101] by inter...

Die richtige Frage zur richtigen Zeit: Ereignisbedingte Fragebogen-Studien mittels und über Smartphone-Apps

Fragebögen sind ein beliebtes und bewährtes Mittel in Usability-Studien. Sie werden oft im Rahmen von Usability-Tests verwendet. Solche Tests stellen jedoch oft künstliche Situationen dar. Data logging, also das automatische Sammeln von Nutzungsdaten, kann hingegen Einblicke in die Nutzung von Applikationen im echten Nutzungskontext geben. Diese Methode hat allerdings die zentrale Schwäche, das...

Cucurbit[5]uril-metal complex-induced room-temperature phosphorescence of α-naphthol and β-naphthol.

Similar to the larger members of the cucurbituril family, such as cucurbit[8]uril (Q[8]), the smallest member, cucurbit[5]uril (Q[5]), can also induce room-temperature phosphorescence (RTP) of α-naphthol (1) and β-naphthol (2). The relationship between the RTP intensity of 1 and 2 and the concentration of Q[5] or Q[8] suggests that the mechanism underlying the Q[5] complex-induced RTP is differ...

^franziskanische Studien

2,4-Dinitro-1-phenoxy­benzene

The title compound, C(12)H(8)N(2)O(5), was obtained by the reaction of 1-chloro-2,4-dinitro-benzene and phenol in the presence of potassium carbonate. The nitro-substituted benzene ring lies on a mirror plane, with one NO(2) group in the same plane and the other disordered across this plane. The phenoxy-benzene unit is placed perpendicular to this mirror, resulting in an exact orthogonal relati...