Blasco Daniel, López-de-Luzuriaga José M, Monge Miguel, Olmos M Elena, Pascual David, Rodríguez-Castillo María
Departamento de Química, Universidad de La Rioja, Centro de Investigación en Síntesis Química (CISQ) , Complejo Científico Tecnológico , 26004 Logroño , Spain.
Inorg Chem. 2018 Apr 2;57(7):3805-3817. doi: 10.1021/acs.inorgchem.7b03131. Epub 2018 Mar 22.
Two water-soluble [Au( N-adeninate)(PR)] complexes (PR = PMe (1); PTA (3)) were synthesized by the coordination of the respective cationic [Au(PR)] fragment to the N position of the adeninate anion. Both complexes crystallize as dimers by aurophilic contacts of 3.2081(6) Å in 1 and 3.0942(7) and 3.0969(7) Å in 3, but different packings are observed due to the crystallizing solvent choice and the nature of the ancillary phosphine ligand. At this regard, different supramolecular behavior is observed in water, ranges from the formation of ultrathin nanowires of 5.3 ± 1.9 nm of diameter and up to 1.5 μm in length and leads to a blue-luminescent hydrogel for 1, to the single-crystallization of 3. Parallel computational studies carried out show that aurophilicity and N-H···N or O-H···N hydrogen bonding are comparable in strength, suggesting a competition between all types of weak forces in the final observed macroscopic properties.
通过将各自的阳离子[Au(PR)]片段与腺嘌呤阴离子的N位配位，合成了两种水溶性[Au(N - 腺嘌呤)(PR)]配合物(PR = PMe (1); PTA (3))。配合物1通过金亲金作用以二聚体形式结晶，金亲金距离为3.2081(6) Å，配合物3的金亲金距离为3.0942(7) Å和3.0969(7) Å，但由于结晶溶剂的选择和辅助膦配体的性质，观察到不同的堆积方式。在这方面，在水中观察到不同的超分子行为，从形成直径为5.3±1.9 nm、长度达1.5μm的超薄纳米线，并导致配合物1形成蓝色发光水凝胶，到配合物3的单晶化。进行的平行计算研究表明，金亲金作用和N - H···N或O - H···N氢键的强度相当，这表明在最终观察到的宏观性质中，所有类型的弱作用力之间存在竞争。
