With a 2-phenylpyridine(ppy)-type cyclometalated Ir(III) complexes with –B(Mes)₂ group Ir–B, the CN^¯ ions can bind effectively with the boron atom in the –B(Mes)₂ group to furnish CN^¯ sensing ability through inducing phosphorescence changing of the concerned Ir(III) complex. Uniquely, with increasing the added amount of CN^¯ ions, loose and tight binding between CN^¯ and boron atom in the –B(Mes)₂ group of Ir–B can occur in sequence to destabilize metal-to-ligand charge transfer (MLCT)excited states and then form new MLCT excited states in Ir–B. Accompanying this process, the red phosphorescence of Ir–B can be effectively quenched by adding CN^¯ ions, while new yellow and green emission bands can appear in sequent with increasing the amount of added CN^¯ ions, showing CN^¯ sensing behavior with unique concentration distinguishing ability. In addition, the new phosphorescent CN^¯ sensor can possess detection limit (DL) as low as 4.3 × 10⁻⁶ M and good selectivity to the CN^¯ ions. Clearly, these results can provide important information for developing new CN^¯ sensors with high performances.

用2-苯基吡啶（PPY）型环金属化铱（III）配合物-B（MES）₂基团的Ir-B中，CN ^¯离子可与在-B（MES）中的硼原子有效地结合₂组到配料CN ^¯通过诱导磷光的有关的Ir（III）络合物的地改变感测能力。与众不同的是，随着CN的添加量^¯离子，松紧CN之间的结合^¯和硼原子在-B（MES）₂基团的IR-B顺序可以发生去稳定的金属-配体电荷转移（MLCT ）激发态，然后在Ir–B中形成新的MLCT激发态。伴随这一过程中，红色磷光铱-B可以有效地通过加入CN猝灭^¯离子，而新的黄色和绿色发射谱带可在序贯随着添加量CN的出现^¯离子，表示CN ^¯具有独特的浓度感测的行为区分能力。此外，新的磷光CN ^¯传感器可以具有检出限（DL）低至4.3×10 ^-6  M和良好的选择性到CN ^¯离子。显然，这些结果可为开发新的CN重要信息^¯与高性能传感器。