Dynamic structural reconstruction of (guanidinium+)2(benzene-1,4-disulfonate2−) host crystal by guest adsorption

Haruka Abe, Takahiro Kobayashi, Norihisa Hoshino, Takashi Takeda, Yasutaka Suzuki, Jun Kawamata, Tomoyuki Akutagawa

Research output: Contribution to journalArticlepeer-review


Guanidinium (G+) and benzene-1,4-disulfonate (BDS2−) form a rigid electrostatic cation-anion crystal lattice, which undergoes an interesting dynamic structural reconstruction through guest adsorption-desorption processes with H2O, pyrrole (Pyrr), pyrazine (Pyz), thiophene (TP), pyridine (Py), 1,4-dioxane (Diox), or aniline (Ani). The host lattice of bis(guanidinium)benzene-1,4-disulfonate, (G+)2(BDS2−), which does not contain void spaces initially, changed to host-guest crystals of (G+)2(BDS2−)·(guest)xupon guest adsorption (x= 1, 2, and 3). The cation-anion electrostatic N-H+O3S- hydrogen bonds between theG+cation andBDS2−dianion formed tightly bound two-dimensional (2D) structures. These layers are connected by perpendicularBDS2−dianions, forming the guest adsorption crystalline pores. The adsorption-desorption isotherm for Diox at 298 K indicated the formation of (G+)2(BDS2−)·(Diox)3, which was consistent with the single-crystal X-ray structural analysis. Single crystals of (G+)2(BDS2−)·(Py-H2O)2consist of two hydrogen-bonded [(G+)2(BDS2−)]2bilayers connected by theBDS2−dianions, forming crystalline pores that accommodate 2 Py guest molecules. The H2O molecules in (G+)2(BDS2−)·(Py-H2O)2are lodged in the intralayer, leading to the [(G+)2(BDS2−)⋯(H2O)2⋯(G+)2(BDS2−)] hydrogen-bonded bilayer. The electrostatic cation-anion host lattice of (G+)2(BDS2−) responded to the guest adsorption-desorption cycle by a dynamic structural reconstruction. A guest adsorption of polar Ani into (G+)2(BDS2−) host changed the crystal symmetry from centricP1̄ to acentricP21of (G+)2(BDS2−)·(Ani)3

Original languageEnglish
Pages (from-to)1149-1157
Number of pages9
Issue number5
Publication statusPublished - 2021 Feb 7

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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