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Pregled bibliografske jedinice broj: 932530

From a square core to square opening: structural diversity and magnetic properties of the oxo-bridged [CrIIINbV] complexes


Jurić, Marijana; Androš Dubraja, Lidija; Popović, Jasminka; Molčanov, Krešimir; Torić, Filip; Pajić, Damir; Lončarić, Ivor
From a square core to square opening: structural diversity and magnetic properties of the oxo-bridged [CrIIINbV] complexes // Dalton transactions, 47 (2018), 12; 4183-4190 doi:10.1039/C7DT04724J (međunarodna recenzija, članak, znanstveni)


Naslov
From a square core to square opening: structural diversity and magnetic properties of the oxo-bridged [CrIIINbV] complexes

Autori
Jurić, Marijana ; Androš Dubraja, Lidija ; Popović, Jasminka ; Molčanov, Krešimir ; Torić, Filip ; Pajić, Damir ; Lončarić, Ivor

Izvornik
Dalton transactions (1477-9226) 47 (2018), 12; 4183-4190

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Oxo-Bridged ; Chromium(III) ; Niobium(V) ; Antiferromagnetic Coupling

Sažetak
Three heterometallic oxo-bridged compounds, [Cr2(phen)4(μ-O)4Nb2(C2O4)4]·2H2O (1 ; phen = 1, 10-phenanthroline), [Cr2(terpy)2(H2O)2(μ-O)4Nb2(C2O4)4]·4H2O (2 ; terpy = 2, 2′ ; 6′, 2′′-terpyridine) and [Cr(terpy)(C2O4)(H2O)][Cr2(terpy)2(C2O4)2(μ-O)2Nb(C2O4)2]·3H2O (3), have been synthesized using a building block approach and characterized by IR spectroscopy, single-crystal and powder X-ray diffraction, magnetization measurements, and DFT calculations. The molecular structures of 1 and 2, crystallizing in P42212 and P21/n space groups, respectively, contain a square-shaped {; ; ; ; CrIII2(μ-O)4NbV2}; ; ; ; unit, while that of complex salt 3 (P[1 with combining macron] space group) consists of a mononuclear cation containing CrIII and trinuclear anions in which two CrIII ions are bridged by a –O–NbV–O– fragment. Besides hydrogen-bonding patterns resulting in a 1D- or 3D-supramolecular arrangement in 1–3, an unusual intermolecular contact has been noticed between parallel oxalate moieties occurring due to the electrostatic attraction of electron-rich carbonyl oxygen and severely electron-depleted carbon atoms in the crystal packing of 2. The antiferromagnetic coupling observed in all three compounds, determined from magnetization measurements (J = −13.51(2), −8.41(1) and −7.44(4) cm−1 for 1, 2 and 3, respectively) and confirmed by DFT calculations, originates from two CrIII ions with spin 3/2 interacting through diamagnetic –O–NbV–O– bridge(s).

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Projekt / tema
EK-H2020-692194 (Fabrizio NESTI, EK - H2020-TWINN-2015)
HRZZ-IP-2014-09-4079 - Novi metal-organsi sustavi s oksalatnim i kinoidnim ligandima s podešenim svojstvima pogodnim za primjenu (Krešimir Molčanov, )
HRZZ-UIP-2014-09-8276 - Multiferični i magnetoelektrični sustavi (Damir Pajić, )

Ustanove
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE


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