Supramolecular nanomaterials containing phosphorescent transition metal clusters

SNAPSTER项目旨在解决照明和光电子领域的能源转换领域的关键挑战。稀土氧化物(REO)目前被用于这些领域，目前被欧盟视为高科技应用的战略矿物，如电动汽车或节能照明。由于REO的主要自然资源位于欧洲以外，迫切需要开发不含REO的发射材料来保证能量的独立性。多学科SNAPSTER项目提出了一种新的含REO发射材料的替代方案。SNAPSTER的目标是开发新的磷光杂化纳米材料，并将其引入光电子器件，以评估其应用前景。一方面，通过高温合成得到的[M6QI8Xa6](A=碱，Q=硫族/卤素，X=卤素，M=Mo，Re)金属簇合物是一种非常有吸引力的发光器件：它们在红色近红外光谱中具有很高的发光强度，与经历光化学、热分解或氧化分解的有机染料相比，它们非常健壮。另一方面，分子自组装是一种很有前途的制备纳米结构杂化材料的方法，其功能由无机部分提供，而结构主要由有机部分指导。在这种情况下，柱状液晶(LCS)在智能材料的设计中引起了极大的兴趣：它们易于加工，表现出自组织和结构缺陷自修复能力，以及高的载流子迁移率。然而，杂化材料需要克服的主要挑战之一是防止有机和无机部分之间的相分离。SNAPSTER项目旨在通过利用LC冠醚衍生物对金属簇合物中所含的碱性离子进行络合的能力，在柱状液晶中引入金属簇合物。通过配位化学聚合合成这些杂化材料，将为研究结构-性质关系和电荷传输评估提供快速访问相关材料库的途径。SNAPSTER是一个多学科的德国-法国项目，加入了3个研究团队P1-P3，他们在固态和有机化学、混合材料、液晶、物理和电子学方面拥有互补的技能。P1和P3有长期的持续合作，共同监督博士生从事涉及化学和电子的项目。P2在含有离子物种和冠醚衍生物的有机液晶领域拥有互补的专业知识，现在参与了与P1的DAAD/PHC Procope双边计划，其中第一个SNAPSTER概念验证结果已于2016年在Chem Commun上发表。这个独特的德法联合体将通过借调到合作实验室为硕士、博士生和博士后提供补充培训，并产生具有高度国际影响力的创新研究。

The SNAPSTER project aims to tackle key challenges in the field of energy conversion for lighting and optoelectronics. Rare earth oxides (REO) are currently used in these fields and are nowadays considered by EU as strategic minerals for high technology applications like electric vehicles or energy efficient lighting. As the main natural resources of REO are located outside Europe, there is a real need to develop REO free emissive materials to guarantee energetic independency.The multidisciplinary SNAPSTER project proposes a new alternative to REO containing emissive materials. SNAPSTER aims to develop new phosphorescent hybrid nanomaterials and introduce them in optoelectronic devices to evaluate their potential in terms of applicative prospects. On one hand, An[M6Qi8Xa6] (A = alkali, Q = chalcogen/halogen, X = halogen, M = Mo, Re) metal cluster compounds, obtained by high temperature synthesis, are very attractive for light emitting devices: they are highly luminescent in the red NIR and are very robust in contrast to organic dyes which suffer from photochemical, thermal or oxidative decomposition. On the other hand, molecular self-assembling is a promising way to generate nanostructured hybrid materials where functionalities are given by inorganic moieties while the structuration is mainly directed by the organic counter-part. In that way, columnar liquid crystals (LCs) are of great interest for the design of smart materials: they are easy to process, show self-organizing and structural defects self-healing abilities as well as high charge carrier mobility. Yet, one of the main challenge to overcome in hybrid materials is to prevent phase segregation between the organic and inorganic moieties. The SNAPSTER project aims to introduce metal clusters in columnar LCs by taking advantage of the ability of LC crown ether derivatives to complex the alkali ions contained in the metal cluster compounds. The convergent synthesis of these hybrid materials via coordination chemistry will give a rapid access to a library of related materials for investigation of structure-property relationships and charge transport evaluation. SNAPSTER is a multidisciplinary German-French project joining 3 research teams P1 – P3 with complementary skills in solid state and organic chemistry, hybrid materials, LC, physics and electronics. P1 and P3 have a long term ongoing collaboration, supervising jointly PhD students working on projects involving chemistry and electronic. P2 who possesses a complementary expertise in the field of organic liquid crystals containing ionic species and crown ether derivatives is now involved in a bilateral DAAD/PHC Procope program with P1 from which, first SNAPSTER proof of concept results have been published in Chem Commun in 2016. This unique German-French consortium will provide complementary training to Master,PhD students and Postdocs via secondments in the partner labs and produce innovative research with a high international impact.