TbC21H15O8 crystallizes in the triclinic P-1 space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 9-coordinate geometry to one O(1), one O(11), one O(14), one O(16), one O(3), one O(5), one O(9), and two equivalent O(7) atoms. The Tb(1)-O(1) bond length is 2.53 Å. The Tb(1)-O(11) bond length is 2.42 Å. The Tb(1)-O(14) bond length is 2.31 Å. The Tb(1)-O(16) bond length is 2.38 Å. The Tb(1)-O(3) bond length is 2.49 Å. The Tb(1)-O(5) bond length is 2.41 Å. The Tb(1)-O(9) bond length is 2.44 Å. There is one shorter (2.31 Å) and one longer (2.61 Å) Tb(1)-O(7) bond length. In the second Tb site, Tb(2) is bonded in a 9-coordinate geometry to one O(10), one O(12), one O(13), one O(15), one O(2), one O(4), one O(6), and two equivalent O(8) atoms. The Tb(2)-O(10) bond length is 2.44 Å. The Tb(2)-O(12) bond length is 2.42 Å. The Tb(2)-O(13) bond length is 2.32 Å. The Tb(2)-O(15) bond length is 2.39 Å. The Tb(2)-O(2) bond length is 2.54 Å. The Tb(2)-O(4) bond length is 2.49 Å. The Tb(2)-O(6) bond length is 2.41 Å. There is one shorter (2.31 Å) and one longer (2.62 Å) Tb(2)-O(8) bond length. There are thirty-three inequivalent C sites. In the first C site, C(33,34) is bonded in a distorted trigonal planar geometry to one C(31), one C(35), and one H(17) atom. The C(33,34)-C(31) bond length is 1.39 Å. The C(33,34)-C(35) bond length is 1.40 Å. The C(33,34)-H(17) bond length is 1.09 Å. In the second C site, C(35) is bonded in a trigonal planar geometry to one C(33,34); one C(37,38); and one C(41,42) atom. The C(35)-C(37,38) bond length is 1.40 Å. The C(35)-C(41,42) bond length is 1.49 Å. In the third C site, C(36) is bonded in a trigonal planar geometry to one C(33,34); one C(37,38); and one C(41,42) atom. The C(36)-C(33,34) bond length is 1.40 Å. The C(36)-C(37,38) bond length is 1.40 Å. The C(36)-C(41,42) bond length is 1.49 Å. In the fourth C site, C(37,38) is bonded in a distorted single-bond geometry to one C(35) and one H(19,20) atom. The C(37,38)-H(19,20) bond length is 1.09 Å. In the fifth C site, C(39) is bonded in a distorted single-bond geometry to one C(29,30) and one H(21,22) atom. The C(39)-C(29,30) bond length is 1.41 Å. The C(39)-H(21,22) bond length is 1.09 Å. In the sixth C site, C(40) is bonded in a distorted single-bond geometry to one C(29,30) and one H(21,22) atom. The C(40)-C(29,30) bond length is 1.41 Å. The C(40)-H(21,22) bond length is 1.09 Å. In the seventh C site, C(41,42) is bonded in a distorted bent 120 degrees geometry to one C(35), one O(11), and one O(9) atom. The C(41,42)-O(11) bond length is 1.29 Å. The C(41,42)-O(9) bond length is 1.28 Å. In the eighth C site, C(1) is bonded in a bent 120 degrees geometry to one C(3), one O(5), and one O(7) atom. The C(1)-C(3) bond length is 1.48 Å. The C(1)-O(5) bond length is 1.27 Å. The C(1)-O(7) bond length is 1.29 Å. In the ninth C site, C(2) is bonded in a bent 120 degrees geometry to one C(4), one O(6), and one O(8) atom. The C(2)-C(4) bond length is 1.48 Å. The C(2)-O(6) bond length is 1.27 Å. The C(2)-O(8) bond length is 1.29 Å. In the tenth C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(13), and one C(5) atom. The C(3)-C(13) bond length is 1.40 Å. The C(3)-C(5) bond length is 1.40 Å. In the eleventh C site, C(4) is bonded in a trigonal planar geometry to one C(14), one C(2), and one C(6) atom. The C(4)-C(14) bond length is 1.40 Å. The C(4)-C(6) bond length is 1.40 Å. In the twelfth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(3); one C(7,8); and one H(1,2) atom. The C(5)-C(7,8) bond length is 1.40 Å. The C(5)-H(1,2) bond length is 1.09 Å. In the thirteenth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(4); one C(7,8); and one H(1,2) atom. The C(6)-C(7,8) bond length is 1.40 Å. The C(6)-H(1,2) bond length is 1.09 Å. In the fourteenth C site, C(7,8) is bonded in a trigonal planar geometry to one C(15), one C(5), and one C(9) atom. The C(7,8)-C(15) bond length is 1.50 Å. The C(7,8)-C(9) bond length is 1.40 Å. In the fifteenth C site, C(9) is bonded in a distorted single-bond geometry to one C(11,12); one C(7,8); and one H(3,4) atom. The C(9)-C(11,12) bond length is 1.40 Å. The C(9)-H(3,4) bond length is 1.09 Å. In the sixteenth C site, C(10) is bonded in a distorted single-bond geometry to one C(11,12); one C(7,8); and one H(3,4) atom. The C(10)-C(11,12) bond length is 1.40 Å. The C(10)-C(7,8) bond length is 1.40 Å. The C(10)-H(3,4) bond length is 1.09 Å. In the seventeenth C site, C(11,12) is bonded in a trigonal planar geometry to one C(13), one C(17), and one C(9) atom. The C(11,12)-C(13) bond length is 1.41 Å. The C(11,12)-C(17) bond length is 1.48 Å. In the eighteenth C site, C(13) is bonded in a distorted single-bond geometry to one C(11,12); one C(3); and one H(5,6) atom. The C(13)-H(5,6) bond length is 1.09 Å. In the nineteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(11,12); one C(4); and one H(5,6) atom. The C(14)-C(11,12) bond length is 1.41 Å. The C(14)-H(5,6) bond length is 1.09 Å. In the twentieth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(7,8); one O(13); and one O(15) atom. The C(15)-O(13) bond length is 1.27 Å. The C(15)-O(15) bond length is 1.28 Å. In the twenty-first C site, C(16) is bonded in a distorted bent 120 degrees geometry to one C(7,8); one O(14); and one O(16) atom. The C(16)-C(7,8) bond length is 1.50 Å. The C(16)-O(14) bond length is 1.27 Å. The C(16)-O(16) bond length is 1.28 Å. In the twenty-second C site, C(17) is bonded in a trigonal planar geometry to one C(11,12); one C(19,20); and one C(27,28) atom. The C(17)-C(19,20) bond length is 1.41 Å. The C(17)-C(27,28) bond length is 1.41 Å. In the twenty-third C site, C(18) is bonded in a trigonal planar geometry to one C(11,12); one C(19,20); and one C(27,28) atom. The C(18)-C(11,12) bond length is 1.48 Å. The C(18)-C(19,20) bond length is 1.41 Å. The C(18)-C(27,28) bond length is 1.41 Å. In the twenty-fourth C site, C(19,20) is bonded in a distorted trigonal planar geometry to one C(17), one C(21), and one H(7) atom. The C(19,20)-C(21) bond length is 1.39 Å. The C(19,20)-H(7) bond length is 1.09 Å. In the twenty-fifth C site, C(21) is bonded in a distorted single-bond geometry to one C(19,20); one C(23); and one H(9,10) atom. The C(21)-C(23) bond length is 1.41 Å. The C(21)-H(9,10) bond length is 1.09 Å. In the twenty-sixth C site, C(22) is bonded in a distorted single-bond geometry to one C(19,20); one C(24); and one H(9,10) atom. The C(22)-C(19,20) bond length is 1.39 Å. The C(22)-C(24) bond length is 1.41 Å. The C(22)-H(9,10) bond length is 1.09 Å. In the twenty-seventh C site, C(23) is bonded in a trigonal planar geometry to one C(21); one C(25,26); and one C(29,30) atom. The C(23)-C(25,26) bond length is 1.41 Å. The C(23)-C(29,30) bond length is 1.47 Å. In the twenty-eighth C site, C(24) is bonded in a trigonal planar geometry to one C(22); one C(25,26); and one C(29,30) atom. The C(24)-C(25,26) bond length is 1.41 Å. The C(24)-C(29,30) bond length is 1.47 Å. In the twenty-ninth C site, C(25,26) is bonded in a distorted single-bond geometry to one C(23) and one H(11,12) atom. The C(25,26)-H(11,12) bond length is 1.09 Å. In the thirtieth C site, C(27,28) is bonded in a distorted single-bond geometry to one C(17) and one H(13) atom. The C(27,28)-H(13) bond length is 1.09 Å. In the thirty-first C site, C(29,30) is bonded in a trigonal planar geometry to one C(23), one C(31), and one C(39) atom. The C(29,30)-C(31) bond length is 1.41 Å. In the thirty-second C site, C(31) is bonded in a distorted trigonal planar geometry to one C(29,30); one C(33,34); and one H(15,16) atom. The C(31)-H(15,16) bond length is 1.09 Å. In the thirty-third C site, C(32) is bonded in a distorted trigonal planar geometry to one C(29,30); one C(33,34); and one H(15,16) atom. The C(32)-C(29,30) bond length is 1.41 Å. The C(32)-C(33,34) bond length is 1.39 Å. The C(32)-H(15,16) bond length is 1.09 Å. There are twenty-one inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(3,4) is bonded in a single-bond geometry to one C(9) atom. In the third H site, H(5,6) is bonded in a single-bond geometry to one C(13) atom. In the fourth H site, H(7) is bonded in a single-bond geometry to one C(19,20) atom. In the fifth H site, H(8) is bonded in a single-bond geometry to one C(19,20) atom. The H(8)-C(19,20) bond length is 1.09 Å. In the sixth H site, H(9,10) is bonded in a single-bond geometry to one C(21) atom. In the seventh H site, H(11,12) is bonded in a single-bond geometry to one C(25,26) atom. In the eighth H site, H(13) is bonded in a single-bond geometry to one C(27,28) atom. In the ninth H site, H(14) is bonded in a single-bond geometry to one C(27,28) atom. The H(14)-C(27,28) bond length is 1.09 Å. In the tenth H site, H(15,16) is bonded in a single-bond geometry to one C(31) atom. In the eleventh H site, H(17) is bonded in a single-bond geometry to one C(33,34) atom. In the twelfth H site, H(18) is bonded in a single-bond geometry to one C(33,34) atom. The H(18)-C(33,34) bond length is 1.09 Å. In the thirteenth H site, H(19,20) is bonded in a single-bond geometry to one C(37,38) atom. In the fourteenth H site, H(21,22) is bonded in a single-bond geometry to one C(39) atom. In the fifteenth H site, H(23) is bonded in a single-bond geometry to one O(1) atom. The H(23)-O(1) bond length is 0.98 Å. In the sixteenth H site, H(24) is bonded in a single-bond geometry to one O(2) atom. The H(24)-O(2) bond length is 0.98 Å. In the seventeenth H site, H(25) is bonded in a single-bond geometry to one O(1) atom. The H(25)-O(1) bond length is 0.98 Å. In the eighteenth H site, H(26) is bonded in a single-bond geometry to one O(2) atom. The H(26)-O(2) bond length is 0.98 Å. In the nineteenth H site, H(27) is bonded in a single-bond geometry to one O(3) atom. The H(27)-O(3) bond length is 0.98 Å. In the twentieth H site, H(28) is bonded in a single-bond geometry to one O(4) atom. The H(28)-O(4) bond length is 0.98 Å. In the twenty-first H site, H(29,30) is bonded in a single-bond geometry to one O(3) atom. The H(29,30)-O(3) bond length is 0.98 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Tb(1), one H(23), and one H(25) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Tb(2), one H(24), and one H(26) atom. In the third O site, O(3) is bonded in a distorted water-like geometry to one Tb(1); one H(27); and one H(29,30) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one Tb(2); one H(28); and one H(29,30) atom. The O(4)-H(29,30) bond length is 0.98 Å. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one Tb(1) and one C(1) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one Tb(2) and one C(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to two equivalent Tb(1) and one C(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to two equivalent Tb(2) and one C(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Tb(1) and one C(41,42) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Tb(2) and one C(41,42) atom. The O(10)-C(41,42) bond length is 1.28 Å. In the eleventh O site, O(11) is bonded in a distorted L-shaped geometry to one Tb(1) and one C(41,42) atom. In the twelfth O site, O(12) is bonded in a distorted L-shaped geometry to one Tb(2) and one C(41,42) atom. The O(12)-C(41,42) bond length is 1.29 Å. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one Tb(2) and one C(15) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 150 degrees geometry to one Tb(1) and one C(16) atom. In the fifteenth O site, O(15) is bonded in a 2-coordinate geometry to one Tb(2) and one C(15) atom. In the sixteenth O site, O(16) is bonded in a 2-coordinate geometry to one Tb(1) and one C(16) atom. Linkers: 4 [O]C(=O)c1ccc(-c2ccc(-c3cc(C([O])=O)cc(C([O])=O)c3)cc2)cc1. Metal clusters: 2 O.O.O.O.[C]1O[Tb]234(O1)O[C]O[Tb]1(O[C]O1)(O[C]O2)(O[C]O3)O[C]O4. The MOF has largest included sphere 5.41 A, density 1.25 g/cm3, surface area 3565.53 m2/g, accessible volume 0.39 cm3/g