2026-10-10T22:22:07Z
https://api.figshare.com/v2/oai
oai:figshare.com:article/34051062
2026-10-02T01:06:18Z
category_1
category_4
category_146
category_915
category_21
category_24
category_873
category_46
category_734
portal_63
item_type_2
month_year_10_2026
Helical Nanocavity-Driven
Upconversion Circularly
Polarized Luminescence with Efficient Triplet Dynamics in Poly(methyl
methacrylate) Stereocomplexes
Towa Shinoda (21610832)
Mayu Mine (21610835)
Wataru Kashihara (7540490)
Arisa Gono (25160331)
Ayano Tokoroyama (25160334)
Chia-Yu Lin (1578007)
An-Ting Pan (25160337)
Noboru Ohta (1366911)
Yoshinobu Nakamura (1829788)
Syuji Fujii (1829797)
Tatsuo Nakagawa (4505584)
Hiroaki Hanada (147267)
Ming-Chia Li (1935970)
Tomoyasu Hirai (1629367)
Biophysics
Biochemistry
Space Science
Physical Sciences not elsewhere classified
Biotechnology
Evolutionary Biology
Chemical Sciences not elsewhere classified
Immunology
Biological Sciences not elsewhere classified
molecular ordering required
electronic circular dichroism
efficient triplet dynamics
532 nm excitation
106 mw cm
enabling efficient uc
air containing oxygen
helical nanocavity coencapsulating
helical nanocavity
threshold intensity
ray diffraction
preserving uc
preferred handedness
oxygen tolerance
oxygen quenching
methyl methacrylate
material retains
effective platform
dissymmetry factor
dimensional architectures
chromophores within
chiral dopant
Triplet–triplet annihilation photon upconversion
circularly
polarized luminescence (TTA-UC-CPL) in solid-state materials remains
challenging because the molecular ordering required for chirality
often compromises triplet energy transfer and oxygen tolerance. Herein,
we report a poly(methyl methacrylate) stereocomplex that forms a helical
nanocavity coencapsulating a chiral dopant, an emitter, and a photosensitizer.
X-ray diffraction, electronic circular dichroism, and vibrational
circular dichroism measurements reveal cooperative confinement of
the chromophores within a helical nanocavity of preferred handedness.
The stereocomplex exhibits efficient UC-CPL under 532 nm excitation
with a threshold intensity of 106 mW cm<sup>–2</sup>. The apparent
triplet decay rate in the presence of the emitter is approximately
40 times faster than oxygen quenching, enabling efficient UC-CPL even
in air containing oxygen. Furthermore, the material retains its dissymmetry
factor over a wide excitation intensity range and can be processed
into three-dimensional architectures while preserving UC-CPL activity.
This work establishes helical polymer nanocavities as an effective
platform for oxygen-tolerant solid-state chiroptical upconversion
materials.
2026-10-01T00:00:00Z
Dataset
Media
10.1021/jacs.6c16205.s001
https://figshare.com/articles/media/Helical_Nanocavity-Driven_Upconversion_Circularly_Polarized_Luminescence_with_Efficient_Triplet_Dynamics_in_Poly_methyl_methacrylate_Stereocomplexes/34051062
CC BY-NC 4.0