Influence of supramolecular bonding contacts on the spin crossover behaviour of iron(ii) complexes from 2,2′-dipyridylamino/s-triazine ligands
作者:Nanthawat Wannarit、Olivier Roubeau、Sujittra Youngme、Simon J. Teat、Patrick Gamez
DOI:10.1039/c3dt50326g
日期:——
Reactions of the related ligands 2-(N,N-bis(2-pyridyl)amino)-4,6-bis(phenoxy)-(1,3,5)triazine (L1) and 2-(N,N-bis(2-pyridyl)amino)-4,6-bis(pentafluorophenoxy)-(1,3,5)triazine (L1FF) with iron(II) thiocyanate produced two spin-crossover coordination compounds with distinct cooperative behaviours. trans-[Fe(L1)2(NCS)2]·2CH2Cl2 (1) displays a very gradual transition centred at T½ = 233 K, characterized
相关配体的反应 2-(N,N-双(2-吡啶基)氨基)-4,6-双(苯氧基)-(1,3,5)三嗪(L1)和2-(N,N-双(2-吡啶基)氨基)-4,6-双(五氟苯氧基)-(1,3,5)三嗪(L1 F F)与硫氰酸铁(II)产生了两种具有独特协同行为的自旋交联配位化合物。反式- [铁(L1)2(NCS)2 ]·2CH 2氯2(1)显示一个非常逐渐过渡为中心在Ť ½= 233 K,其特征在于,一个Δ Ť 80(即该温度范围内其中80%的认为发生了90 K的跃迁,而氟化的反式[[Fe(L1 F F)2(NCS)2 ]·2CH 3 CN(3)的跃迁明显更陡峭(并且集中在Ť ½= 238 K),具有Δ Ť 80 50 K,从由氟化酚基团引起的超分子接触得到的。配位化合物相当于1与硒氰酸根阴离子,即反式- [铁(L1)2(NCSE)2 ]·4CH 2氯2 ·4CH 3 OH(2),也表现出SCO特性在中心Ť