A time-resolved infrared vibrational spectroscopic study of the photo-dynamics of crystalline materials.

Time-resolved infrared vibrational spectroscopy is a structurally sensitive probe of the excited-state properties of matter. The technique has found many applications in the study of molecules in dilute solution phase but has rarely been applied to crystalline samples. We report on the use of a sensitive pump-probe time-resolved infrared spectrometer and sample handling techniques for studies of the ultrafast excited-state dynamics of crystalline materials.

Photocrystallographic structure determination of a new geometric isomer of [Ru(NH3)4(H2O)(eta1-OSO)][MeC6H4SO3]2.

The structure of a new metastable geometric isomer of [Ru(NH3)4(H2O)(SO2)][MeC6H4SO3]2 in which the SO2 group is coordinated through a single oxygen in an eta1-OSO bonding mode has been determined at 13 K; the new isomer was obtained as a 36% component of the structure within a single crystal upon irradiation using a tungsten lamp.

4,4'-Trimethylenedipyridinium bis[carboxymethylphosphonate(1-)]: a three-dimensional framework structure built from O-H...O, N-H...O and C-H...O hydrogen bonds.

In the title compound, C(13)H(16)N(2)(2+).2C(2)H(4)O(5)P(-), the cation lies across a twofold rotation axis in space group Fdd2. The anions are linked into molecular ladders by two O-H.

1,4,8,11-Tetraazoniacyclotetradecane tetrakis(phenylphosphonate) dihydrate forms hydrogen-bonded sheets.

In the title compound, C(10)H(28)N(4)(4+).4C(6)H(6)O(3)P(-).2H(2)O, the cation lies across a centre of inversion in space group P2(1)/n.

meso-5,5,7,12,12,14-Hexamethyl-4,11-diaza-1,8-diazoniacyclotetradecane (S)-malate(2-) methanol disolvate: a chain of rings generated by two pairs of N-H.O hydrogen bonds.

The title compound is a methanol-solvated salt, C(16)H(38)N(4)(2+).C(4)H(4)O(5)(2-).2CH(3)OH, in which the ionic components are linked into chains by two pairs of N-H.

meso-5,5,7,12,12,14-hexamethyl-1,4-diaza-8,11-diazoniacyclotetradecane bis(2-naphthoate) ethanol disolvate: centrosymmetric five-component aggregates linked into sheets by C-H...pi(arene) hydrogen bonding.

The title compound is an ethanol-solvated salt, C(16)H(38)N(4)(2+) x -2C(11)H(7)O(2)(-) x -2C(2)H(6)O, in which the cation lies across a centre of inversion in P2(1)/c. The ions are linked by N-H..

The 1:1 adduct of triphenylsilanol and 4,4'-bipyridyl, and three pairwise-concomitant triclinic polymorphs of the 4:1 adduct having Z' = 0.5, 1 and 4.

Crystallization from methanol solution of mixtures of triphenylsilanol and 4,4'-bipyridyl has given a 1:1 adduct (I), Ph(3)SiOH.C(10)H(8)N(2), and three polymorphic 4:1 adducts (II)-(IV), (Ph(3)SiOH)(4).C(10)H(8)N(2).

Phosphonopropionic acid as a building block in supramolecular chemistry: salts with organic diamines.

The structures of seven salts formed by phosphonopropionic acid with organic diamines are reported; in these salts, the hydrogen-bonded substructures formed by the anions can be zero-, one- or two-dimensional, while the overall hydrogen-bonded supramolecular structures are three-dimensional. The 1:1 adduct, compound (1), formed between 1,2-bis(4'-pyridyl)ethene and phosphonopropionic acid is a salt, [[(C(12)H(10)N(2))H(2)](2+)].[(C(12)H(10)N(2))].

Salts of maleic and fumaric acids with organic polyamines: comparison of isomeric acids as building blocks in supramolecular chemistry.

Maleic acid and fumaric acid both readily form adducts with organic diamines: maleic acid usually forms 2:1 adducts with bases, while fumaric acid usually forms 1:1 adducts, and the supramolecular structures within the two series are not simply related. The 1:2 adducts formed by 1,2-bis(4-pyridyl)ethane and by 4,4'-bipyridyl, respectively, with maleic acid, compounds (1) and (2), are salts [(diamine)H(2)(2+)].[(C(4)H(3)O(4))(-)](2) in which the cations lie across a centre of inversion and a twofold rotation axis, respectively.

Two polymorphs, with Z' = 1 and 2, of 2-amino-4-chloro-6-morpholinopyrimidine in P21/c, and 2-amino-4-chloro-6-piperidinopyrimidine, which is isomorphous and almost isostructural with the Z' = 2 polymorph.

Crystallization of 2-amino-4-chloro-6-morpholinopyrimidine, C(8)H(11)ClN(4)O, (I), yields two polymorphs, both with space group P2(1)/c, having Z' = 1 (from diethyl ether solution) and Z' = 2 (from dichloromethane solution), denoted (Ia) and (Ib), respectively. In polymorph (Ia), the molecules are linked by an N-H..

A triclinic polymorph of benzanilide: disordered molecules form hydrogen-bonded chains.

In the P-1 polymorph of benzanilide or N-phenylbenzamide, C(13)H(11)NO, the molecules are linked into simple C(4) chains by N-H...

N,N'-Dithiobisphthalimide-nitrobenzene (2/1): a Pn solvate with localized solvent molecules ordered head-to-tail in channels.

N,N'-Dithiobisphthalimide crystallizes from nitrobenzene solution as a solvate, 2C(16)H(8)N(2)O(4)S(2).C(6)H(5)NO(2), having space group Pn. The bisphthalimide molecules are linked by C-H.

Self-assembled hydrogen-bonded bilayers in 1,4-diazabicyclo[2.2.2]octane-N-(phosphonomethyl)iminodiacetic acid-water (1/1/1.5).

The title compound is a hydrated salt, 1,4-diazoniabicyclo[2.2.2]octane-N-[(hydroxyphosphinato)methyl]iminiodiacetate-water (1/1/1.

Tetrameric triphenylsilanol, (Ph(3)SiOH)(4), and the adduct (Ph(3)SiOH)(2)-dimethyl sulfoxide, both at 120 K, and the adduct (Ph(3)SiOH)(4)-1,4-dioxan at 150 K: interplay of O[bond]H...O and C[bond]H...pi(arene) interactions.

The structure of tetrameric triphenylsilanol, C(18)H(16)OSi, (I), has been re-investigated at 120 (2) K. The hydroxyl H atoms were readily located and one of the arene rings is disordered over two closely positioned sets of sites. The molecules are linked into cyclic tetramers, having approximate 4 (S(4)) symmetry, via O[bond]H.

N,N'-Dithiobisphthalimide-1,4-dioxan (1/0.6): a C2/c solvate with disordered solvent molecules localized in channels.

N,N'-Dithiobisphthalimide crystallizes from 1,4-dioxan solution as a solvate, 3C(16)H(8)N(2)O(4)S(2) x 1.8C(4)H(8)O(2), having space group C2/c. Four of the 12 C(16)H(8)N(2)O(4)S(2) molecules in the unit cell lie on twofold rotation axes, while the other eight lie in general positions.