ErAgC20H12(N2O3)3 crystallizes in the triclinic P-1 space group. Er(1) is bonded in a distorted hexagonal bipyramidal geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. The Er(1)-O(1) bond length is 2.41 Å. The Er(1)-O(2) bond length is 2.37 Å. The Er(1)-O(3) bond length is 2.44 Å. The Er(1)-O(4) bond length is 2.33 Å. The Er(1)-O(5) bond length is 2.22 Å. The Er(1)-O(7) bond length is 2.36 Å. The Er(1)-O(8) bond length is 2.38 Å. The Er(1)-O(9) bond length is 2.39 Å. Ag(1) is bonded in a 3-coordinate geometry to one N(1), one N(2), and one N(4) atom. The Ag(1)-N(1) bond length is 2.11 Å. The Ag(1)-N(2) bond length is 2.62 Å. The Ag(1)-N(4) bond length is 2.13 Å. There are twenty inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one C(6), and one N(6) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(6) bond length is 1.39 Å. The C(1)-N(6) bond length is 1.42 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one H(3) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-H(3) bond length is 1.09 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(9) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-C(9) bond length is 1.49 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(4) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-H(4) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(10), one C(4), and one C(6) atom. The C(5)-C(10) bond length is 1.49 Å. The C(5)-C(6) bond length is 1.39 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one H(5) atom. The C(6)-H(5) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one N(4), one N(6), and one H(6) atom. The C(7)-N(4) bond length is 1.32 Å. The C(7)-N(6) bond length is 1.37 Å. The C(7)-H(6) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one N(5), one N(6), and one H(7) atom. The C(8)-N(5) bond length is 1.31 Å. The C(8)-N(6) bond length is 1.38 Å. The C(8)-H(7) bond length is 1.08 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(2) atom. The C(9)-O(1) bond length is 1.28 Å. The C(9)-O(2) bond length is 1.28 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(3), and one O(4) atom. The C(10)-O(3) bond length is 1.28 Å. The C(10)-O(4) bond length is 1.27 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(12), one C(16), and one N(3) atom. The C(11)-C(12) bond length is 1.39 Å. The C(11)-C(16) bond length is 1.40 Å. The C(11)-N(3) bond length is 1.43 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(8) atom. The C(12)-C(13) bond length is 1.40 Å. The C(12)-H(8) 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(20) atom. The C(13)-C(14) bond length is 1.40 Å. The C(13)-C(20) bond length is 1.50 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13), one C(15), and one H(9) atom. The C(14)-C(15) bond length is 1.40 Å. The C(14)-H(9) bond length is 1.09 Å. In the fifteenth C site, C(15) is bonded in a trigonal planar geometry to one C(14), one C(16), and one C(19) atom. The C(15)-C(16) bond length is 1.40 Å. The C(15)-C(19) bond length is 1.51 Å. In the sixteenth C site, C(16) is bonded in a distorted single-bond geometry to one C(11), one C(15), and one H(10) atom. The C(16)-H(10) bond length is 1.09 Å. In the seventeenth C site, C(17) is bonded in a trigonal planar geometry to one N(1), one N(3), and one H(11) atom. The C(17)-N(1) bond length is 1.32 Å. The C(17)-N(3) bond length is 1.37 Å. The C(17)-H(11) bond length is 1.08 Å. In the eighteenth C site, C(18) is bonded in a trigonal planar geometry to one N(2), one N(3), and one H(12) atom. The C(18)-N(2) bond length is 1.32 Å. The C(18)-N(3) bond length is 1.38 Å. The C(18)-H(12) bond length is 1.09 Å. In the nineteenth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one C(15), one O(5), and one O(6) atom. The C(19)-O(5) bond length is 1.28 Å. The C(19)-O(6) bond length is 1.26 Å. In the twentieth C site, C(20) is bonded in a distorted bent 120 degrees geometry to one C(13), one O(7), and one O(8) atom. The C(20)-O(7) bond length is 1.28 Å. The C(20)-O(8) bond length is 1.28 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Ag(1), one C(17), and one N(2) atom. The N(1)-N(2) bond length is 1.38 Å. In the second N site, N(2) is bonded in a distorted single-bond geometry to one Ag(1), one C(18), and one N(1) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one C(11), one C(17), and one C(18) atom. In the fourth N site, N(4) is bonded in a 3-coordinate geometry to one Ag(1), one C(7), and one N(5) atom. The N(4)-N(5) bond length is 1.38 Å. In the fifth N site, N(5) is bonded in a distorted water-like geometry to one C(8) and one N(4) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one C(1), one C(7), and one C(8) atom. There are twelve inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(9) atom. The H(1)-O(9) bond length is 1.00 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(9) atom. The H(2)-O(9) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(7) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(8) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(12) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(14) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(16) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(17) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(18) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted L-shaped geometry to one Er(1) and one C(9) atom. In the second O site, O(2) is bonded in a distorted L-shaped geometry to one Er(1) and one C(9) atom. In the third O site, O(3) is bonded in a distorted L-shaped geometry to one Er(1) and one C(10) atom. In the fourth O site, O(4) is bonded in a distorted L-shaped geometry to one Er(1) and one C(10) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Er(1) and one C(19) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one C(19) atom. In the seventh O site, O(7) is bonded in a distorted L-shaped geometry to one Er(1) and one C(20) atom. In the eighth O site, O(8) is bonded in a distorted L-shaped geometry to one Er(1) and one C(20) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Er(1), one H(1), and one H(2) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)cc(-n2cnnc2)c1. Metal clusters: 2 O.O=[C]O[Er]1(O[C]=O)(O[C]=O)O[C]O1 ,1 [N][N][Ag].[N][N][Ag]. The MOF has largest included sphere 2.76 A, density 2.41 g/cm3, surface area 2624.25 m2/g, accessible volume 0.10 cm3/g