Eu4Zn8C44H7(N2O5)8 crystallizes in the triclinic P1 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(10), one O(2), one O(26), one O(27), one O(3), one O(5), one O(6), and one O(9) atom. The Eu(1)-O(10) bond length is 2.44 Å. The Eu(1)-O(2) bond length is 2.39 Å. The Eu(1)-O(26) bond length is 2.44 Å. The Eu(1)-O(27) bond length is 2.43 Å. The Eu(1)-O(3) bond length is 2.38 Å. The Eu(1)-O(5) bond length is 2.81 Å. The Eu(1)-O(6) bond length is 2.59 Å. The Eu(1)-O(9) bond length is 2.47 Å. In the second Eu site, Eu(2,3,4) is bonded in a 8-coordinate geometry to one O(12,22,32); one O(13,23,33); one O(15); one O(19,29,39); one O(20,30,40); one O(37); and two equivalent O(16,36) atoms. The Eu(2,3,4)-O(12,22,32) bond length is 2.39 Å. The Eu(2,3,4)-O(13,23,33) bond length is 2.38 Å. The Eu(2,3,4)-O(15) bond length is 2.81 Å. The Eu(2,3,4)-O(19,29,39) bond length is 2.47 Å. The Eu(2,3,4)-O(20,30,40) bond length is 2.44 Å. The Eu(2,3,4)-O(37) bond length is 2.43 Å. There is one shorter (2.44 Å) and one longer (2.59 Å) Eu(2,3,4)-O(16,36) bond length. There are seven inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in an octahedral geometry to one N(1); one N(3,7); one N(4,8); one O(1); one O(15); and one O(8) atom. The Zn(1)-N(1) bond length is 2.09 Å. The Zn(1)-N(3,7) bond length is 2.09 Å. The Zn(1)-N(4,8) bond length is 2.05 Å. The Zn(1)-O(1) bond length is 2.16 Å. The Zn(1)-O(15) bond length is 2.22 Å. The Zn(1)-O(8) bond length is 2.30 Å. In the second Zn site, Zn(2) is bonded in a distorted T-shaped geometry to one N(10), one O(24), and one O(8) atom. The Zn(2)-N(10) bond length is 2.02 Å. The Zn(2)-O(24) bond length is 2.19 Å. The Zn(2)-O(8) bond length is 1.99 Å. In the third Zn site, Zn(3) is bonded in an octahedral geometry to one N(3,7); one N(4,8); one N(5); one O(11); one O(18); and one O(5) atom. The Zn(3)-N(3,7) bond length is 2.09 Å. The Zn(3)-N(4,8) bond length is 2.05 Å. The Zn(3)-N(5) bond length is 2.09 Å. The Zn(3)-O(11) bond length is 2.16 Å. The Zn(3)-O(18) bond length is 2.30 Å. The Zn(3)-O(5) bond length is 2.22 Å. In the fourth Zn site, Zn(4,8) is bonded in a distorted T-shaped geometry to one N(6,14); one O(14,34); and one O(18) atom. The Zn(4,8)-N(6,14) bond length is 2.02 Å. The Zn(4,8)-O(14,34) bond length is 2.19 Å. The Zn(4,8)-O(18) bond length is 1.99 Å. In the fifth Zn site, Zn(5) is bonded in an octahedral geometry to one N(12), one N(15), one N(9), one O(21), one O(28), and one O(35) atom. The Zn(5)-N(12) bond length is 2.05 Å. The Zn(5)-N(15) bond length is 2.09 Å. The Zn(5)-N(9) bond length is 2.09 Å. The Zn(5)-O(21) bond length is 2.16 Å. The Zn(5)-O(28) bond length is 2.30 Å. The Zn(5)-O(35) bond length is 2.22 Å. In the sixth Zn site, Zn(6) is bonded in a distorted T-shaped geometry to one N(2), one O(28), and one O(4) atom. The Zn(6)-N(2) bond length is 2.02 Å. The Zn(6)-O(28) bond length is 1.99 Å. The Zn(6)-O(4) bond length is 2.19 Å. In the seventh Zn site, Zn(7) is bonded in an octahedral geometry to one N(11), one N(13), one N(16), one O(25), one O(31), and one O(38) atom. The Zn(7)-N(11) bond length is 2.09 Å. The Zn(7)-N(13) bond length is 2.09 Å. The Zn(7)-N(16) bond length is 2.05 Å. The Zn(7)-O(25) bond length is 2.22 Å. The Zn(7)-O(31) bond length is 2.16 Å. The Zn(7)-O(38) bond length is 2.30 Å. There are thirty 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 1.26 Å. The C(1)-O(2) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one N(1) atom. The C(2)-C(3) bond length is 1.38 Å. The C(2)-N(1) bond length is 1.37 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one N(2) atom. The C(3)-C(4) bond length is 1.48 Å. The C(3)-N(2) bond length is 1.37 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(4)-O(3) bond length is 1.25 Å. The C(4)-O(4) bond length is 1.26 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one N(1); one N(2); and one H(1,3,6) atom. The C(5)-N(1) bond length is 1.34 Å. The C(5)-N(2) bond length is 1.35 Å. The C(5)-H(1,3,6) bond length is 1.14 Å. In the sixth C site, C(6,16,36) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(6,16,36)-O(5) bond length is 1.26 Å. The C(6,16,36)-O(6) bond length is 1.28 Å. In the seventh C site, C(7,17) is bonded in a distorted single-bond geometry to one C(8,18) and one N(3,7) atom. The C(7,17)-C(8,18) bond length is 1.39 Å. The C(7,17)-N(3,7) bond length is 1.38 Å. In the eighth C site, C(8,18) is bonded in a distorted single-bond geometry to one C(7,17); one C(9,19); and one N(4,8) atom. The C(8,18)-C(9,19) bond length is 1.48 Å. The C(8,18)-N(4,8) bond length is 1.37 Å. In the ninth C site, C(9,19) is bonded in a distorted bent 120 degrees geometry to one C(8,18); one O(7,17); and one O(8) atom. The C(9,19)-O(7,17) bond length is 1.25 Å. The C(9,19)-O(8) bond length is 1.28 Å. In the tenth C site, C(10,20) is bonded in a trigonal planar geometry to one N(3,7); one N(4,8); and one H(2,4) atom. The C(10,20)-N(3,7) bond length is 1.34 Å. The C(10,20)-N(4,8) bond length is 1.33 Å. The C(10,20)-H(2,4) bond length is 1.14 Å. In the eleventh C site, C(11,21,31) is bonded in a distorted bent 120 degrees geometry to one C(12,32); one O(11); and one O(12,22,32) atom. The C(11,21,31)-C(12,32) bond length is 1.47 Å. The C(11,21,31)-O(11) bond length is 1.26 Å. The C(11,21,31)-O(12,22,32) bond length is 1.25 Å. In the twelfth C site, C(12,32) is bonded in a distorted single-bond geometry to one C(11,21,31); one C(13,33); and one N(5) atom. The C(12,32)-C(13,33) bond length is 1.38 Å. The C(12,32)-N(5) bond length is 1.37 Å. In the thirteenth C site, C(13,33) is bonded in a distorted trigonal planar geometry to one C(12,32); one C(14,34); and one N(6,14) atom. The C(13,33)-C(14,34) bond length is 1.48 Å. The C(13,33)-N(6,14) bond length is 1.37 Å. In the fourteenth C site, C(14,34) is bonded in a distorted bent 120 degrees geometry to one C(13,33); one O(13,23,33); and one O(14,34) atom. The C(14,34)-O(13,23,33) bond length is 1.25 Å. The C(14,34)-O(14,34) bond length is 1.26 Å. In the fifteenth C site, C(15,35) is bonded in a trigonal planar geometry to one N(5); one N(6,14); and one H(1,3,6) atom. The C(15,35)-N(5) bond length is 1.34 Å. The C(15,35)-N(6,14) bond length is 1.35 Å. The C(15,35)-H(1,3,6) bond length is 1.14 Å. In the sixteenth C site, C(22) is bonded in a distorted single-bond geometry to one C(11,21,31); one C(23); and one N(9) atom. The C(22)-C(11,21,31) bond length is 1.47 Å. The C(22)-C(23) bond length is 1.38 Å. The C(22)-N(9) bond length is 1.37 Å. In the seventeenth C site, C(23) is bonded in a distorted trigonal planar geometry to one C(22), one C(24), and one N(10) atom. The C(23)-C(24) bond length is 1.48 Å. The C(23)-N(10) bond length is 1.37 Å. In the eighteenth C site, C(24) is bonded in a distorted bent 120 degrees geometry to one C(23); one O(13,23,33); and one O(24) atom. The C(24)-O(13,23,33) bond length is 1.25 Å. The C(24)-O(24) bond length is 1.26 Å. In the nineteenth C site, C(25) is bonded in a bent 120 degrees geometry to one N(10) and one N(9) atom. The C(25)-N(10) bond length is 1.35 Å. The C(25)-N(9) bond length is 1.34 Å. In the twentieth C site, C(26) is bonded in a distorted bent 120 degrees geometry to one C(27), one O(25), and one O(26) atom. The C(26)-C(27) bond length is 1.48 Å. The C(26)-O(25) bond length is 1.26 Å. The C(26)-O(26) bond length is 1.28 Å. In the twenty-first C site, C(27) is bonded in a distorted single-bond geometry to one C(26), one C(28), and one N(11) atom. The C(27)-C(28) bond length is 1.39 Å. The C(27)-N(11) bond length is 1.38 Å. In the twenty-second C site, C(28) is bonded in a distorted single-bond geometry to one C(27), one C(29), and one N(12) atom. The C(28)-C(29) bond length is 1.48 Å. The C(28)-N(12) bond length is 1.37 Å. In the twenty-third C site, C(29) is bonded in a distorted bent 120 degrees geometry to one C(28), one O(27), and one O(28) atom. The C(29)-O(27) bond length is 1.25 Å. The C(29)-O(28) bond length is 1.28 Å. In the twenty-fourth C site, C(30) is bonded in a trigonal planar geometry to one N(11), one N(12), and one H(5) atom. The C(30)-N(11) bond length is 1.34 Å. The C(30)-N(12) bond length is 1.33 Å. The C(30)-H(5) bond length is 1.14 Å. In the twenty-fifth C site, C(37) is bonded in a distorted single-bond geometry to one C(38) and one N(15) atom. The C(37)-C(38) bond length is 1.39 Å. The C(37)-N(15) bond length is 1.38 Å. In the twenty-sixth C site, C(38) is bonded in a distorted single-bond geometry to one C(37), one C(39), and one N(16) atom. The C(38)-C(39) bond length is 1.48 Å. The C(38)-N(16) bond length is 1.37 Å. In the twenty-seventh C site, C(39) is bonded in a distorted bent 120 degrees geometry to one C(38), one O(37), and one O(38) atom. The C(39)-O(37) bond length is 1.25 Å. The C(39)-O(38) bond length is 1.28 Å. In the twenty-eighth C site, C(40) is bonded in a trigonal planar geometry to one N(15), one N(16), and one H(7) atom. The C(40)-N(15) bond length is 1.34 Å. The C(40)-N(16) bond length is 1.33 Å. The C(40)-H(7) bond length is 1.14 Å. In the twenty-ninth C site, C(41,43) is bonded in a distorted bent 120 degrees geometry to one O(19,29,39) and one O(9) atom. The C(41,43)-O(19,29,39) bond length is 1.25 Å. The C(41,43)-O(9) bond length is 1.25 Å. In the thirtieth C site, C(42,44) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(20,30,40) atom. The C(42,44)-O(10) bond length is 1.25 Å. The C(42,44)-O(20,30,40) bond length is 1.25 Å. There are thirteen inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(2), and one C(5) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Zn(6), one C(3), and one C(5) atom. In the third N site, N(3,7) is bonded in a distorted trigonal planar geometry to one Zn(3); one C(10,20); and one C(7,17) atom. In the fourth N site, N(4,8) is bonded in a trigonal planar geometry to one Zn(1); one C(10,20); and one C(8,18) atom. In the fifth N site, N(5) is bonded in a distorted trigonal planar geometry to one Zn(3); one C(12,32); and one C(15,35) atom. In the sixth N site, N(6,14) is bonded in a distorted trigonal planar geometry to one Zn(4,8); one C(13,33); and one C(15,35) atom. In the seventh N site, N(9) is bonded in a distorted trigonal planar geometry to one Zn(5), one C(22), and one C(25) atom. In the eighth N site, N(10) is bonded in a distorted trigonal planar geometry to one Zn(2), one C(23), and one C(25) atom. In the ninth N site, N(11) is bonded in a distorted trigonal planar geometry to one Zn(7), one C(27), and one C(30) atom. In the tenth N site, N(12) is bonded in a trigonal planar geometry to one Zn(5), one C(28), and one C(30) atom. In the eleventh N site, N(13) is bonded in a distorted trigonal planar geometry to one Zn(7); one C(12,32); and one C(15,35) atom. The N(13)-C(12,32) bond length is 1.37 Å. The N(13)-C(15,35) bond length is 1.34 Å. In the twelfth N site, N(15) is bonded in a distorted trigonal planar geometry to one Zn(5), one C(37), and one C(40) atom. In the thirteenth N site, N(16) is bonded in a trigonal planar geometry to one Zn(7), one C(38), and one C(40) atom. There are four inequivalent H sites. In the first H site, H(1,3,6) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(2,4) is bonded in a single-bond geometry to one C(10,20) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(30) atom. In the fourth H site, H(7) is bonded in a single-bond geometry to one C(40) atom. There are twenty-nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one C(4) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Zn(6) and one C(4) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Eu(1); one Zn(3); and one C(6,16,36) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Eu(1); one Eu(2,3,4); and one C(6,16,36) atom. The O(6)-Eu(2,3,4) bond length is 2.44 Å. In the seventh O site, O(7,17) is bonded in a 2-coordinate geometry to one Eu(2,3,4) and one C(9,19) atom. The O(7,17)-Eu(2,3,4) bond length is 2.43 Å. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Zn(1); one Zn(2); and one C(9,19) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Eu(1) and one C(41,43) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Eu(1) and one C(42,44) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Zn(3) and one C(11,21,31) atom. In the twelfth O site, O(12,22,32) is bonded in a distorted bent 150 degrees geometry to one Eu(2,3,4) and one C(11,21,31) atom. In the thirteenth O site, O(13,23,33) is bonded in a distorted bent 150 degrees geometry to one Eu(2,3,4) and one C(14,34) atom. In the fourteenth O site, O(14,34) is bonded in a distorted bent 120 degrees geometry to one Zn(4,8) and one C(14,34) atom. In the fifteenth O site, O(15) is bonded in a 2-coordinate geometry to one Eu(2,3,4); one Zn(1); and one C(6,16,36) atom. The O(15)-C(6,16,36) bond length is 1.26 Å. In the sixteenth O site, O(16,36) is bonded in a 3-coordinate geometry to two equivalent Eu(2,3,4) and one C(6,16,36) atom. The O(16,36)-C(6,16,36) bond length is 1.28 Å. In the seventeenth O site, O(18) is bonded in a trigonal planar geometry to one Zn(3); one Zn(4,8); and one C(9,19) atom. The O(18)-C(9,19) bond length is 1.28 Å. In the eighteenth O site, O(19,29,39) is bonded in a distorted bent 120 degrees geometry to one Eu(2,3,4) and one C(41,43) atom. In the nineteenth O site, O(20,30,40) is bonded in a distorted bent 120 degrees geometry to one Eu(2,3,4) and one C(42,44) atom. In the twentieth O site, O(21) is bonded in a bent 120 degrees geometry to one Zn(5) and one C(11,21,31) atom. The O(21)-C(11,21,31) bond length is 1.26 Å. In the twenty-first O site, O(24) is bonded in a distorted bent 120 degrees geometry to one Zn(2) and one C(24) atom. In the twenty-second O site, O(25) is bonded in a 2-coordinate geometry to one Eu(2,3,4); one Zn(7); and one C(26) atom. The O(25)-Eu(2,3,4) bond length is 2.81 Å. In the twenty-third O site, O(26) is bonded in a 3-coordinate geometry to one Eu(1); one Eu(2,3,4); and one C(26) atom. The O(26)-Eu(2,3,4) bond length is 2.59 Å. In the twenty-fourth O site, O(27) is bonded in a 2-coordinate geometry to one Eu(1) and one C(29) atom. In the twenty-fifth O site, O(28) is bonded in a trigonal planar geometry to one Zn(5), one Zn(6), and one C(29) atom. In the twenty-sixth O site, O(31) is bonded in a bent 120 degrees geometry to one Zn(7) and one C(11,21,31) atom. The O(31)-C(11,21,31) bond length is 1.26 Å. In the twenty-seventh O site, O(35) is bonded in a 2-coordinate geometry to one Eu(2,3,4); one Zn(5); and one C(6,16,36) atom. The O(35)-Eu(2,3,4) bond length is 2.81 Å. The O(35)-C(6,16,36) bond length is 1.26 Å. In the twenty-eighth O site, O(37) is bonded in a 2-coordinate geometry to one Eu(2,3,4) and one C(39) atom. In the twenty-ninth O site, O(38) is bonded in a trigonal planar geometry to one Zn(4,8); one Zn(7); and one C(39) atom. The O(38)-Zn(4,8) bond length is 1.99 Å. Linkers: 4 [O]C(=O)C1=C(C([O])=O)N=C[N]1 ,3 [O]C(=O)[C]1N=CN=C1C([O])=O ,1 [O]C(=O)C1=N[C]N=C1C([O])=O ,2 [O]C(=O)C([O])=O. Metal clusters: 4 [Eu] ,8 [Zn]. The MOF has largest included sphere 4.37 A, density 2.22 g/cm3, surface area 2386.47 m2/g, accessible volume 0.16 cm3/g