deprotection of phosphate, phosphate, and sulfite esters by silica chloride is described. silica chloride is a mild, selective, and effective reagent for cleavage of benzyl and t-butyl esters of the above compounds.

A molecular conjugate made of a free-base diphenyl porphyrin chromophore (DPP) trans-linked to two N-acridinium units has been synthesized and photophysically characterized in acetonitrile. Interestingly, the emission both fluorophores is quenched array at room temperature. Steady-state time-resolved optical analysis proved that an ultrafast electron transfer from acridinium occurs upon excitat...

In the crystal structure of the title compound, C(14)H(12)NS(+)·CF(3)SO(3) (-), N-H⋯O hydrogen bonds link cations and anions into ion pairs. Inversely oriented ion pairs form stacks through multidirectional π-π inter-actions among the acridine units. The crystal structure features a network of C-H⋯O inter-actions among stacks and also long-range electrostatic inter-actions among ions. In the pa...

In the title compound, C(13)H(10)N(+)·C(7)H(5)O(3) (-) or (acrH)(+)(Hsal)(-), the asymmetric unit contains one acridinium cation and one salicylate anion. The acridinium N atom is protonated and the carb-oxy-lic acid group of salicylic acid is deprotonated. Both moieties are planar, with an r.m.s. deviation of 0.0127 Å for the acr cation and 0.0235 ° for the sal anion. They are aligned with a d...

In the crystal structure of the title compound, C(19)H(14)N(+)·CF(3)SO(3) (-), the cations are linked to each other by very weak C-H⋯π inter-actions, while the cations and anions are connected by N-H⋯O, C-H⋯O and S-O⋯π inter-actions. The acridine ring system and the phenyl ring are oriented at an angle of 80.1 (1)° with respect to each other. The mean planes of adjacent acridine units are eithe...

The title compound, C(13)H(10)N(+)·C(9)H(5)O(6) (-)·H(2)O, exhibits a wide range of non-covalent inter-actions, such as O-H⋯O and N-H⋯O hydrogen bonds, π-π stacking [centroid-centroid distances = 3.562 (8) and 3.872 (8) Å] and ion pairing, connecting the various components into a supra-molecular structure.