Persistent room-temperature phosphorescence or high-contrast phosphorescent mechanochromism: polymorphism-dependent different emission characteristics from a single gold() complex

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 5; no. 22; pp. 7744 - 7749
• Main Authors: Wang, Xiao-Yan, Yin, Ya, Yin, Jun, Chen, Zhao, Liu, Sheng Hua
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 08.06.2021
• Subjects: Crystallography; Data collection; Gold; Mechanoluminescence; Molecular structure; NMR; Nuclear magnetic resonance; Optoelectronics; Phosphorescence; Polymorphism; Room temperature
• ISSN: 1477-9226; 1477-9234; 1477-9234
• DOI: 10.1039/d1dt00959a

Luminophores with persistent room-temperature phosphorescence (p-RTP) or effective phosphorescent mechanochromism features have significant potential applications in the field of optoelectronic materials. Until now, p-RTP and remarkable phosphorescent mechanochromism phenomena have been observed in some luminescent molecules with different molecular structures. However, separately realizing p-RTP and high-contrast phosphorescent mechanochromism in different polymorphs from a single luminophore is still a valuable and challenging topic. In this work, two polymorphs 1B and 1YG of a new gold( i ) complex with blue and yellow-green luminescence, respectively, are reported. Interestingly, 1B exhibits high-contrast phosphorescent mechanochromic behavior, while 1YG exhibits a persistent room-temperature phosphorescence effect. This is the first example of simultaneously obtaining double-purpose crystalline materials with a high-contrast phosphorescent mechanochromism or persistent room-temperature phosphorescence feature from a single luminophore. Two polymorphs 1B and 1YG of a new gold( i ) complex are reported. Interestingly, 1B exhibits high-contrast phosphorescent mechanochromic behavior, while 1YG exhibits a persistent room-temperature phosphorescence effect.