Gd2C24N3H19O14C5NH4 crystallizes in the triclinic P-1 space group. The structure consists of one 4,4'-bipyridine molecule inside a Gd2C24N3H19O14 framework. In the Gd2C24N3H19O14 framework, there are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 9-coordinate geometry to one N(1), one O(11), one O(12), one O(2), one O(3), one O(5), one O(7), and two equivalent O(1) atoms. The Gd(1)-N(1) bond length is 2.66 Å. The Gd(1)-O(11) bond length is 2.38 Å. The Gd(1)-O(12) bond length is 2.48 Å. The Gd(1)-O(2) bond length is 2.69 Å. The Gd(1)-O(3) bond length is 2.32 Å. The Gd(1)-O(5) bond length is 2.36 Å. The Gd(1)-O(7) bond length is 2.34 Å. There is one shorter (2.41 Å) and one longer (2.54 Å) Gd(1)-O(1) bond length. In the second Gd site, Gd(2) is bonded in a 9-coordinate geometry to one O(10), one O(13), one O(14), one O(2), one O(3), one O(4), one O(6), one O(8), and one O(9) atom. The Gd(2)-O(10) bond length is 2.39 Å. The Gd(2)-O(13) bond length is 2.46 Å. The Gd(2)-O(14) bond length is 2.56 Å. The Gd(2)-O(2) bond length is 2.33 Å. The Gd(2)-O(3) bond length is 2.76 Å. The Gd(2)-O(4) bond length is 2.45 Å. The Gd(2)-O(6) bond length is 2.32 Å. The Gd(2)-O(8) bond length is 2.40 Å. The Gd(2)-O(9) bond length is 2.43 Å. There are twenty-four inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.47 Å. The C(1)-O(1) bond length is 1.29 Å. The C(1)-O(2) bond length is 1.27 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(8) atom. The C(2)-C(3) bond length is 1.41 Å. The C(2)-C(8) bond length is 1.41 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one H(11) atom. The C(3)-H(11) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(5) and one H(12) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-H(12) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(7) atom. The C(5)-C(6) bond length is 1.48 Å. The C(5)-C(7) bond length is 1.39 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(3), and one O(4) atom. The C(6)-O(3) bond length is 1.27 Å. The C(6)-O(4) bond length is 1.28 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(5), one C(8), and one H(13) atom. The C(7)-C(8) bond length is 1.40 Å. The C(7)-H(13) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(2), one C(7), and one N(1) atom. The C(8)-N(1) bond length is 1.40 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(5), and one O(6) atom. The C(9)-C(10) bond length is 1.49 Å. The C(9)-O(5) bond length is 1.27 Å. The C(9)-O(6) bond length is 1.28 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(16), and one C(9) atom. The C(10)-C(11) bond length is 1.41 Å. The C(10)-C(16) bond length is 1.43 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(10), one C(12), and one H(14) atom. The C(11)-C(12) bond length is 1.39 Å. The C(11)-H(14) bond length is 1.09 Å. In the twelfth C site, C(12) is bonded in a distorted single-bond geometry to one C(11), one C(13), and one H(15) atom. The C(12)-C(13) bond length is 1.41 Å. The C(12)-H(15) bond length is 1.09 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one C(12), one C(14), and one C(15) atom. The C(13)-C(14) bond length is 1.50 Å. The C(13)-C(15) bond length is 1.39 Å. In the fourteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(13), one O(7), and one O(8) atom. The C(14)-O(7) bond length is 1.27 Å. The C(14)-O(8) bond length is 1.29 Å. In the fifteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(13), one C(16), and one H(16) atom. The C(15)-C(16) bond length is 1.41 Å. The C(15)-H(16) bond length is 1.09 Å. In the sixteenth C site, C(16) is bonded in a distorted trigonal planar geometry to one C(10), one C(15), and one N(2) atom. The C(16)-N(2) bond length is 1.37 Å. In the seventeenth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one C(18), one O(10), and one O(9) atom. The C(17)-C(18) bond length is 1.47 Å. The C(17)-O(10) bond length is 1.30 Å. The C(17)-O(9) bond length is 1.28 Å. In the eighteenth C site, C(18) is bonded in a trigonal planar geometry to one C(17), one C(19), and one C(24) atom. The C(18)-C(19) bond length is 1.41 Å. The C(18)-C(24) bond length is 1.43 Å. In the nineteenth C site, C(19) is bonded in a distorted single-bond geometry to one C(18) and one H(17) atom. The C(19)-H(17) bond length is 1.09 Å. In the twentieth C site, C(20) is bonded in a distorted single-bond geometry to one C(21) and one H(18) atom. The C(20)-C(21) bond length is 1.41 Å. The C(20)-H(18) bond length is 1.09 Å. In the twenty-first C site, C(21) is bonded in a trigonal planar geometry to one C(20), one C(22), and one C(23) atom. The C(21)-C(22) bond length is 1.49 Å. The C(21)-C(23) bond length is 1.39 Å. In the twenty-second C site, C(22) is bonded in a distorted bent 120 degrees geometry to one C(21), one O(11), and one O(12) atom. The C(22)-O(11) bond length is 1.28 Å. The C(22)-O(12) bond length is 1.28 Å. In the twenty-third C site, C(23) is bonded in a distorted single-bond geometry to one C(21), one C(24), and one H(19) atom. The C(23)-C(24) bond length is 1.41 Å. The C(23)-H(19) bond length is 1.09 Å. In the twenty-fourth C site, C(24) is bonded in a distorted trigonal planar geometry to one C(18), one C(23), and one N(3) atom. The C(24)-N(3) bond length is 1.37 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal non-coplanar geometry to one Gd(1), one C(8), one H(5), and one H(6) atom. The N(1)-H(5) bond length is 1.02 Å. The N(1)-H(6) bond length is 1.02 Å. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(16), one H(7), and one H(8) atom. The N(2)-H(7) bond length is 1.02 Å. The N(2)-H(8) bond length is 1.02 Å. In the third N site, N(3) is bonded in a trigonal planar geometry to one C(24), one H(10), and one H(9) atom. The N(3)-H(10) bond length is 1.02 Å. The N(3)-H(9) bond length is 1.02 Å. There are nineteen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(13) atom. The H(1)-O(13) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(13) atom. The H(2)-O(13) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(14) atom. The H(3)-O(14) bond length is 0.97 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(14) atom. The H(4)-O(14) bond length is 0.98 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one N(1) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one N(2) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one N(2) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one N(3) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one N(3) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(3) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(4) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(7) atom. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one C(11) atom. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one C(12) atom. In the sixteenth H site, H(16) is bonded in a single-bond geometry to one C(15) atom. In the seventeenth H site, H(17) is bonded in a single-bond geometry to one C(19) atom. In the eighteenth H site, H(18) is bonded in a single-bond geometry to one C(20) atom. In the nineteenth H site, H(19) is bonded in a single-bond geometry to one C(23) atom. There are fourteen inequivalent O sites. In the first O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Gd(1) and one C(14) atom. In the second O site, O(8) is bonded in a distorted single-bond geometry to one Gd(2) and one C(14) atom. In the third O site, O(9) is bonded in a distorted single-bond geometry to one Gd(2) and one C(17) atom. In the fourth O site, O(10) is bonded in a distorted L-shaped geometry to one Gd(2) and one C(17) atom. In the fifth O site, O(11) is bonded in a distorted L-shaped geometry to one Gd(1) and one C(22) atom. In the sixth O site, O(12) is bonded in a distorted single-bond geometry to one Gd(1) and one C(22) atom. In the seventh O site, O(13) is bonded in a water-like geometry to one Gd(2), one H(1), and one H(2) atom. In the eighth O site, O(14) is bonded in a water-like geometry to one Gd(2), one H(3), and one H(4) atom. In the ninth O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Gd(1) and one C(1) atom. In the tenth O site, O(2) is bonded in a 2-coordinate geometry to one Gd(1), one Gd(2), and one C(1) atom. In the eleventh O site, O(3) is bonded in a 2-coordinate geometry to one Gd(1), one Gd(2), and one C(6) atom. In the twelfth O site, O(4) is bonded in a distorted single-bond geometry to one Gd(2) and one C(6) atom. In the thirteenth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Gd(1) and one C(9) atom. In the fourteenth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Gd(2) and one C(9) atom. Linkers: 6 Nc1cc(C([O])=O)ccc1C([O])=O. Metal clusters: 1 O.O.O.O.[C]1O[Gd]234(O1)O[C]O[Gd]1(O[C]O1)(O[C]O2)(O[C]O3)O[C]O4.[C]1O[Gd]234(O1)O[C]O[Gd]1(O[C]O1)(O[C]O2)(O[C]O3)O[C]O4. RCSR code: pcu. The MOF has largest included sphere 1.87 A, density 2.21 g/cm3, surface area 3088.28 m2/g, accessible volume 0.11 cm3/g