1,3,5,7,9,11,13,15-Octaazapentacyclo[9.5.1.13,9.06,18.014,17]octadecane-4,8,12,16-tetrone monohydrate: a methylene-bridged glycoluril dimer

1,3,5,7,9,11,13,15-Octa­azapenta­cyclo­[9.5.1.13,9.06,18.014,17]octa­decane-4,8,12,16-tetrone monohydrate: a methyl­ene-bridged glycoluril dimer

In the title compound, C(10)H(12)N(8)O(4)·H(2)O, prepared from the reaction of glycoluril with paraformaldehyde, the organic molecule has mm symmetry. The asymmetric unit comprises one quarter of the mol-ecule and a half-mol-ecule of water. The dimer is formed by bridging two glycoluril mol-ecules with methyl-ene groups at the 1 and 6 positions. In the crystal structure, mol-ecules are linked v...

Three-state photochromic switching in a silyl bridged diarylethene dimer.

The synthesis and photochemical characterization of bicomponent molecular switches based on covalently tethered dithienylethene photochromes is described. Both photochromic units undergo complete switching between the fully cyclised and fully non-cyclised states despite a significant level of electronic communication between the individual units and their proximity.

in a twisted , oxime - bridged [ Mn ( III ) 2 ] dimer

Photochromism of a water-soluble vesicular [2.2]paracyclophane-bridged imidazole dimer.

Here we report the first photochromism of a newly designed [2.2]paracyclophane-bridged imidazole dimer in water. The photochromic dye with a hydrophilic and a hydrophobic substituent forms vesicles in water and shows instantaneous colouration upon UV light irradiation and successive rapid fading in the dark.

An Acetylene-Bridged 6,8-Purine Dimer as a Fluorescent Switch-On Probe for Parallel G-Quadruplexes**