01198nas a2200169   4500008004100000245015300041210006900194260000800263300001400271490000700285520053500292100002000827700001700847700002100864700001700885856012600902       2013                        eng d00aComprehensive study on mutual interplay of multiple V-shaped ligands on the helical nature of a series of coordination polymers and their properties0 aComprehensive study on mutual interplay of multiple Vshaped liga  cDEC  a5487-54980 v133 a<p>{V-shaped ligands are commonly used for helical coordination polymer synthesis. However, employment of multiple V-shaped ligands does not always lead to a helical network. The mutual interplay of two V-shaped ligands, which is neither easily predictable nor well documented, plays a major role directing the self-assembly of the resultant network. We report here the construction of a series of novel coordination polymers {[Ni(OBA)(H2MDP)(H2O)]center dot(DMF)(3)}(n) (1),{[Ni(FBA)(H2MDP)]center dot(H2O)(3)center dot(DMF)\</p>1 aGoswami, Arijit1 aBala, Sukhen1 aPachfule, Pradip1 aMondal, Raju  uhttps://library.ncl.res.in/content/comprehensive-study-mutual-interplay-multiple-v-shaped-ligands-helical-nature-series-002333nas a2200217   4500008004100000022001400041245017900055210006900234260007100303300001400374490000700388520144900395100001701844700002601861700002201887700001801909700002601927700001901953700001701972856012601989       2015                        eng d  a0020-166900aConstruction of polynuclear lanthanide (Ln = Dy-III, Tb-III, and Nd-III) cage complexes using pyridine-pyrazole-based ligands: versatile molecular topologies and smm behavior0 aConstruction of polynuclear lanthanide Ln DyIII TbIII and NdIII   a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcSEP  a8197-82060 v543 a<p>Employment of two different pyridyl pyrazolyl-based ligands afforded three octanudear lanthanide(III) (Ln = Dy, Tb) cage compounds and one hexanudear neodymium(III) coordination cage, exhibiting versatile molecular architectures including a butterfly core. Relatively less common semirigid pyridyl pyrazolyl-based asymmetric ligand systems show an interesting trend of forming polynuclear lanthanide cage complexes with different coordination environments around the metal centers. It is noteworthy here that construction of lanthanide complex itself is a challenging task in a ligand system as soft N-donor rich as pyridyl pyrazol. We report herein some lanthanide complexes using ligand containing only one or two O-donors compare to five N-coordinating sites. The resultant multinuclear lanthanide complexes show interesting magnetic and spectroscopic features originating from different spatial arrangements of the metal ions. Alternating current (ac) susceptibility measurements of the two dysprosium complexes display frequency- and temperature-dependent out-of-phase signals in zero and 0.5 T direct current field, a typical characteristic feature of single-molecule magnet (SMM) behavior, indicating different energy reversal barriers due to different molecular topologies. Another aspect of this work is the occurrence of the not-so-common SMM behavior of the terbium complex, further confirmed by ac susceptibility measurement.</p>1 aBala, Sukhen1 aBishwas, Mousumi, Sen1 aPramanik, Bhaskar1 aKhanra, Sumit1 aFromrn, Katharina, M.1 aPoddar, Pankaj1 aMondal, Raju  uhttps://library.ncl.res.in/content/construction-polynuclear-lanthanide-ln-dy-iii-tb-iii-and-nd-iii-cage-complexes-using-0