Raising the capability of supporting and suppressing the leaching possibility to a very insignificant level has still remained challenging for some class of transition metals, i.e. Ni²⁺. Here we present the covalent functionalisation of macrocyclic ligand, 4,13-diaza-18-crown-6 (kryptofix 22), on the surface of carbon nanotube (CNT), leading to a unique adsorptive capability for supporting Ni²⁺. This material was incorporated as a promising catalyst in coupling reactions including CC, CN, and CO cross-coupling reactions. We demonstrate that the kryptofix 22 functionalisation on the surface of CNT has a key role in the enhancement of the adsorption capability Ni²⁺ and subsequent catalytic activity. We further prove that this ligand causes a significant boost in the recyclability of the reactions due to the extremely trivial Ni²⁺ leaching from the CNT’s surface during the reactions.

对于某些过渡金属，即Ni ²⁺，将支撑能力和抑制浸出的可能性提高到非常微不足道的水平仍然具有挑战性。在这里，我们介绍了碳纳米管（CNT）表面上的大环配体4,13-diaza-18-crown-6（kryptofix 22）的共价官能化，从而导致了支持Ni ²⁺的独特吸附能力。将该材料作为有前途的催化剂掺入包括C C，CN和CO交叉偶联反应在内的偶联反应中。我们证明CNT表面上的kryptofix 22功能化在提高吸附能力Ni ^2+中具有关键作用以及随后的催化活性。我们进一步证明，由于在反应过程中从CNT的表面极少的Ni ²⁺浸出，该配体导致反应的可循环性显着提高。