The title compound, C(6)H(4)Cl(2)O(2), exhibits a two-dimensional supra-molecular hydrogen-bonded network and forms a three-dimensional network supra-molecular structure via hydrogen bonds and π-π stacking of benzene rings. The π-π inter-actions are between the benzene rings of centrosymmetrically related mol-ecules, with centroid-centroid distances of 3.7676 (13) and 3.7107 (13) Å.

In the mol-ecule of the title compound, C(20)H(16)N(2)O(5), the phthalimide fragments are almost planar, with r.m.s. deviations of 0.018 and 0.020 Å, and make a dihedral angle of 53.64 (3)°. The mol-ecular and crystal structures are stabilized by a weak inter-molecular C-H⋯O, C-H⋯π and C=O⋯π [2.883 (1) Å] inter-actions and aromatic π-π stacking inter-actions with a centroid-centroid distance of...

The title coordination polymer, [Ni(C7H3NO4)(C4H4N2)(C2H6OS)] n , consists of [010] chains composed of Ni(II) ions linked by bis-monodentate-bridging pyrazine mol-ecules. Each of the two crystallographically distinct Ni(II) ions is located on a mirror plane and is additionally coordinated by a dimethyl sulfoxide (DMSO) ligand through the oxygen atom and by a tridentate 2,6-pyridine-di-carb-oxy-...

The asymmetric unit of the title compound, (C(13)H(13)IN)[Ni(C(6)H(4)S(2))(2)], contains half each of two centrosymmetric anions and a single cation in a general position. In the anions, the Ni(III) ions are surrounded by four S atoms in a distorted square-planar geometry. In the crystal, the anions exhibit two different packing modes by stacking along the a axis in face-to-face and side-by-sid...

In the crystal structure of the title compound, C(5)H(8)N(3) (+)·H(2)PO(4) (-), N-H⋯O hydrogen bonds, involving the unprotonated amino-group and the NH(+) group in the pyridinium ring and dihydrogenphosphate O atoms, link the cations and anions. A long chain-like stacking of dihydrogenphosphate anions along the c-axis direction is constructed by O-H⋯O hydrogen bonds. Also along the c-axis direc...

Carbon quantum dots assembled with gambogic acid via a π–π stacking interaction for cancer therapy have high drug loading and targeted delivery, which can overcome resistance, short circulation, retention in cells, thereby exhibiting significant inhibitory effect on the growth of HepG2 HeLa cells. This is reported by Jianfeng Wang co-workers article number 2200201.

Paramagnetic suppression in TTTA at pressure is caused by a steady decrease the separation between moieties containing radical electron along π-stacking chains with no phase transition.