Anti-Kasha's Rule Emissive Switching Induced by Intermolecular H-Bonding

Zhou, YunyunFudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China. (författare)

QC 20181210
The exploration of emission pathways from high-excited states in organic luminogens has recently become prosperous owing to improved possibilities to study so-called anti-Kasha's rule emission with the potential of improving the luminescent quantum efficiency. However, emission pathway switching among different high-excited states has rarely been addressed through external control. We here present a rational design and synthesis of a novel azulene-based emitter to achieve a responsive control of its anti-Kasha's rule emissive switching. The emitter initially gives rise to an S-3-to-S-0 dominant emission as indicated by our experimental and theoretical studies. On this basis, it can be toggled into an S-2-to-S-0 dominant emission upon the H-bond formation between the triformyl groups and water molecules. Such a process, which originates from the H-bonding regulated distribution of excited state energy, is accompanied by a remarkable fluorescent color conversion and a significant improvement of the fluorescent quantum yield in the azulene family. Moreover, a reversible emissive switching in doped films was observed to depend on a solid-state H-bond tuning process with moisture sensitivity. These results may provide new insight for building advanced chemical systems for visualized sensing with high distinguishability.

Baryshnikov, Gleb V.KTH,Teoretisk kemi och biologi,KTH Royal Inst Technol, Div Theoret Chem & Biol, Sch Biotechnol, SE-10691 Stockholm, Sweden;Bogdan Khmelnitsky Natl Univ, Dept Chem & Nanomat Sci, UA-18031 Cherkassy, Ukraine(Swepub:kth)u1qlzxjx (författare)
Li, XupingFudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China. (författare)
Zhu, MingjieFudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China. (författare)
Ågren, HansUppsala universitet,KTH,Teoretisk kemi och biologi,Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden.,Molekyl- och kondenserade materiens fysik,KTH Royal Inst Technol, Div Theoret Chem & Biol, Sch Biotechnol, SE-10691 Stockholm, Sweden(Swepub:uu)hanag788 (författare)
Zhu, LiangliangFudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China. (författare)
Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China.Teoretisk kemi och biologi (creator_code:org_t)

Ingår i:Chemistry of Materials: AMER CHEMICAL SOC30:21, s. 8008-80160897-47561520-5002

Av författaren/redakt...: Zhou, Yunyun; Baryshnikov, Gle ...; Li, Xuping; Zhu, Mingjie; Ågren, Hans; Zhu, Liangliang

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.