A molecular dyad of an iron complex covalently bound to an annihilator exhibits three photoactive excited states — singlet, doublet, and triplet — enabling homomolecular upconversion
Florian Doettinger, Jonathan Sagaya, Giacomo Morselli in @jacs.acspublications.org
pubs.acs.org/doi/10.1021/...
Florian Doettinger, Jonathan Sagaya, Giacomo Morselli in @jacs.acspublications.org
pubs.acs.org/doi/10.1021/...
Homomolecular Photon Upconversion in a Perylene-Decorated Iron(III) Complex
Classical upconversion employs sensitizers and annihilators as two distinct molecular species and is, therefore, classified as heteromolecular. Homomolecular upconversion, the unification of both role...
pubs.acs.org
November 9, 2025 at 2:40 PM
A molecular dyad of an iron complex covalently bound to an annihilator exhibits three photoactive excited states — singlet, doublet, and triplet — enabling homomolecular upconversion
Florian Doettinger, Jonathan Sagaya, Giacomo Morselli in @jacs.acspublications.org
pubs.acs.org/doi/10.1021/...
Florian Doettinger, Jonathan Sagaya, Giacomo Morselli in @jacs.acspublications.org
pubs.acs.org/doi/10.1021/...
Near-infrared spatiotemporal color vision in humans enabled by upconversion contact lenses www.cell.com/cell/fulltex... 😮
Near-infrared spatiotemporal color vision in humans enabled by upconversion contact lenses
Based on the principle of refractive index matching, highly transparent upconversion
contact lenses (UCLs) with a high concentration of upconversion nanoparticles (UCNPs)
were developed. These lenses ...
www.cell.com
May 24, 2025 at 7:02 AM
Near-infrared spatiotemporal color vision in humans enabled by upconversion contact lenses www.cell.com/cell/fulltex... 😮
Increasing Photon Upconversion Efficiency with Structural Exciton Localization
Increasing Photon Upconversion Efficiency with Structural Exciton Localization
Hackaday Article
hackaday.com
June 26, 2026 at 2:03 AM
Increasing Photon Upconversion Efficiency with Structural Exciton Localization
Researchers in #ScienceAdvances have developed a colloidal quantum dot–based upconverter that turns multispectral infrared light to full color vision, allowing people to see in the infrared spectrum.
Learn more: https://scim.ag/4bixCUt
Learn more: https://scim.ag/4bixCUt
Multispectral infrared-to-full-color upconversion expanding human vision
Multispectral infrared-to-full-color visible upconversion expands human vision beyond natural limits.
scim.ag
August 5, 2026 at 6:00 PM
Researchers in #ScienceAdvances have developed a colloidal quantum dot–based upconverter that turns multispectral infrared light to full color vision, allowing people to see in the infrared spectrum.
Learn more: https://scim.ag/4bixCUt
Learn more: https://scim.ag/4bixCUt
#OEA_highlight High-efficiency infrared upconversion imaging with nonlinear silicon metasurfaces empowered by quasi-bound states in the continuum doi.org/10.29026/oea... by #Jumin_Qiu #Qiegen_Liu #Shuyuan_Xiao @NCUniv1921 #infrared #upconversion #imaging #nonlinear #metasurfaces #BIC
February 11, 2026 at 8:52 AM
#OEA_highlight High-efficiency infrared upconversion imaging with nonlinear silicon metasurfaces empowered by quasi-bound states in the continuum doi.org/10.29026/oea... by #Jumin_Qiu #Qiegen_Liu #Shuyuan_Xiao @NCUniv1921 #infrared #upconversion #imaging #nonlinear #metasurfaces #BIC
New preprint! "All-passive upconversion imaging of incoherent near-infrared light at intensities down to 50 nW/cm^2" arxiv.org/abs/2411.18707 🧪💡
This was a large collaborative work led by Rabeeya Hamid in our group, in collaboration with Dan Congreve's group at Stanford, and supported by DARPA
This was a large collaborative work led by Rabeeya Hamid in our group, in collaboration with Dan Congreve's group at Stanford, and supported by DARPA
December 2, 2024 at 7:05 PM
New preprint! "All-passive upconversion imaging of incoherent near-infrared light at intensities down to 50 nW/cm^2" arxiv.org/abs/2411.18707 🧪💡
This was a large collaborative work led by Rabeeya Hamid in our group, in collaboration with Dan Congreve's group at Stanford, and supported by DARPA
This was a large collaborative work led by Rabeeya Hamid in our group, in collaboration with Dan Congreve's group at Stanford, and supported by DARPA
Cool paper on chiral patterns on dumbell shaped upconversion nanoparticles #chemsky #chemistry #nano #chiralchem #chirality
www.science.org/doi/full/10....
www.science.org/doi/full/10....
March 3, 2025 at 11:49 AM
Cool paper on chiral patterns on dumbell shaped upconversion nanoparticles #chemsky #chemistry #nano #chiralchem #chirality
www.science.org/doi/full/10....
www.science.org/doi/full/10....
Happy to share the publication of Automated Research Platform for Development of Triplet–Triplet Annihilation Photon Upconversion Systems pubs.acs.org/doi/full/10....
in ACS Central Science
@upc.edu
@erc.europa.eu
in ACS Central Science
@upc.edu
@erc.europa.eu
March 26, 2025 at 10:38 AM
Happy to share the publication of Automated Research Platform for Development of Triplet–Triplet Annihilation Photon Upconversion Systems pubs.acs.org/doi/full/10....
in ACS Central Science
@upc.edu
@erc.europa.eu
in ACS Central Science
@upc.edu
@erc.europa.eu
@explosionsandfire.bsky.social finally does an upconversion material! 😁🍿 #chemsky
youtu.be/7WT0qZdHT5M?...
youtu.be/7WT0qZdHT5M?...
Doin' Upconversion: making doped Yttrium oxide
YouTube video by Extractions&Ire
youtu.be
February 8, 2025 at 2:28 PM
@explosionsandfire.bsky.social finally does an upconversion material! 😁🍿 #chemsky
youtu.be/7WT0qZdHT5M?...
youtu.be/7WT0qZdHT5M?...
I am super exited to share the publication hashtag#openaccess of our paper “Automated Research Platform for Development of Triplet−Triplet Annihilation Photon Upconversion Systems” published in
@acs.org Central Science
pubs.acs.org/doi/10.1021/...
@acs.org Central Science
pubs.acs.org/doi/10.1021/...
February 22, 2025 at 10:03 AM
I am super exited to share the publication hashtag#openaccess of our paper “Automated Research Platform for Development of Triplet−Triplet Annihilation Photon Upconversion Systems” published in
@acs.org Central Science
pubs.acs.org/doi/10.1021/...
@acs.org Central Science
pubs.acs.org/doi/10.1021/...
Cool upconversion nanoparticle research in the news: seeing infrared with upconversion contact lenses!
#upconversion #chemsky
www.nature.com/articles/d41...
#upconversion #chemsky
www.nature.com/articles/d41...
These contact lenses give people infrared vision — even with their eyes shut
Sci-fi-style technology uses nanoparticles to convert infrared light into visible light that humans can see.
www.nature.com
May 27, 2025 at 9:18 AM
Cool upconversion nanoparticle research in the news: seeing infrared with upconversion contact lenses!
#upconversion #chemsky
www.nature.com/articles/d41...
#upconversion #chemsky
www.nature.com/articles/d41...
Finally got something out in Chem Comms on spectral upconversion for solar hydrogen collab with old mate Greg Metha at Adelaide U. @unswchemistry.bsky.social #chemsky
December 4, 2024 at 1:43 AM
Finally got something out in Chem Comms on spectral upconversion for solar hydrogen collab with old mate Greg Metha at Adelaide U. @unswchemistry.bsky.social #chemsky
Delighted that our article on safety and reproducibility of autoclave nanoparticle synthesis is published in CommsChem #openaccess #chemsky #nanomaterials
www.nature.com/articles/s42...
www.nature.com/articles/s42...
Autoclave reactor synthesis of upconversion nanoparticles, unreported variables, and safety considerations - Communications Chemistry
Autoclaves are widely used for the synthesis of upconversion nanoparticles, yet several key synthesis variables are widely unreported, hampering reproducibility. Here, the authors highlight several pa...
www.nature.com
February 7, 2025 at 11:44 AM
Delighted that our article on safety and reproducibility of autoclave nanoparticle synthesis is published in CommsChem #openaccess #chemsky #nanomaterials
www.nature.com/articles/s42...
www.nature.com/articles/s42...
Very nice to have our paper on superfluorescent upconversion nanoparticles highlited in the RSC Nanoscale Horizons summer newsletter :) #ChemSky
pubs.rsc.org/en/content/a...
pubs.rsc.org/en/content/a...
Superfluorescent upconversion nanoparticles as an emerging second generation quantum technology material
Superfluorescence (SF) in lanthanide doped upconversion nanoparticles (UCNPs) is a room-temperature quantum phenomenon, first discovered in 2022. In a SF process, the many emissive lanthanide ions wit...
pubs.rsc.org
August 21, 2025 at 11:42 AM
Very nice to have our paper on superfluorescent upconversion nanoparticles highlited in the RSC Nanoscale Horizons summer newsletter :) #ChemSky
pubs.rsc.org/en/content/a...
pubs.rsc.org/en/content/a...
The UK's first dedicated #upconversion spectrometer is now up and running in my research group - high upconversion sensitivity detection, lifetime and quantum yield* capabilities. Please get in touch if you are interested in collaborating!
*Full upconversion QY coming later 2026
*Full upconversion QY coming later 2026
January 5, 2026 at 4:02 PM
The UK's first dedicated #upconversion spectrometer is now up and running in my research group - high upconversion sensitivity detection, lifetime and quantum yield* capabilities. Please get in touch if you are interested in collaborating!
*Full upconversion QY coming later 2026
*Full upconversion QY coming later 2026
🇯🇵 Japanese scientists developed contact lenses that let humans see infrared light by converting it into visible signals. Using upconversion nanoparticles, wearers can detect infrared direction and intensity. Current lenses are limited, but future versions…
www.theguardian.com/science/2025...
www.theguardian.com/science/2025...
September 27, 2025 at 1:10 PM
🇯🇵 Japanese scientists developed contact lenses that let humans see infrared light by converting it into visible signals. Using upconversion nanoparticles, wearers can detect infrared direction and intensity. Current lenses are limited, but future versions…
www.theguardian.com/science/2025...
www.theguardian.com/science/2025...
We have our 1st trade-off between TBS/TNT & Max:
Max is the cord cutter solution & seems like it has better video/sound quality (even if the 4K version is just an upconversion and the Atmos is virtualized, it looks REALLY good, maybe just higher bitrate?)
But...no PIP breaks on Max. #AEWDynamite
Max is the cord cutter solution & seems like it has better video/sound quality (even if the 4K version is just an upconversion and the Atmos is virtualized, it looks REALLY good, maybe just higher bitrate?)
But...no PIP breaks on Max. #AEWDynamite
January 2, 2025 at 1:24 AM
We have our 1st trade-off between TBS/TNT & Max:
Max is the cord cutter solution & seems like it has better video/sound quality (even if the 4K version is just an upconversion and the Atmos is virtualized, it looks REALLY good, maybe just higher bitrate?)
But...no PIP breaks on Max. #AEWDynamite
Max is the cord cutter solution & seems like it has better video/sound quality (even if the 4K version is just an upconversion and the Atmos is virtualized, it looks REALLY good, maybe just higher bitrate?)
But...no PIP breaks on Max. #AEWDynamite
Excited to share our newest paper in
@JMaterChem C on multilayer films for photon upconversion-driven photoswitching!
A super cool collaborative project lead by Rachel Evans
@cambridgeuni.bsky.social
#TTAUC🌈
#photoswitch↔️
pubs.rsc.org/en/Content/A...
@JMaterChem C on multilayer films for photon upconversion-driven photoswitching!
A super cool collaborative project lead by Rachel Evans
@cambridgeuni.bsky.social
#TTAUC🌈
#photoswitch↔️
pubs.rsc.org/en/Content/A...
November 27, 2024 at 8:35 PM
Excited to share our newest paper in
@JMaterChem C on multilayer films for photon upconversion-driven photoswitching!
A super cool collaborative project lead by Rachel Evans
@cambridgeuni.bsky.social
#TTAUC🌈
#photoswitch↔️
pubs.rsc.org/en/Content/A...
@JMaterChem C on multilayer films for photon upconversion-driven photoswitching!
A super cool collaborative project lead by Rachel Evans
@cambridgeuni.bsky.social
#TTAUC🌈
#photoswitch↔️
pubs.rsc.org/en/Content/A...
🚨 Now in #JACS : The Ayitou lab at #UIC has reported the first aerobic photon upconversion using all-organic donor-acceptor chromophores, which can perform doublet-to-triplet energy transfer (DTET).
Read it here: tinyurl.com/3ycxa4rf
Read it here: tinyurl.com/3ycxa4rf
Doublet Spin State Mediated Photoluminescence Upconversion in Organic Radical Donor-Triplet Acceptor Dyads
Donor–acceptor dyads are promising materials for improving triplet-sensitized photon upconversion due to faster intramolecular energy transfer (ET), which unfortunately competes with charge transfer (...
tinyurl.com
December 23, 2024 at 4:18 PM
🚨 Now in #JACS : The Ayitou lab at #UIC has reported the first aerobic photon upconversion using all-organic donor-acceptor chromophores, which can perform doublet-to-triplet energy transfer (DTET).
Read it here: tinyurl.com/3ycxa4rf
Read it here: tinyurl.com/3ycxa4rf
New Hot article from @ckerzig.bsky.social, @gloriusfrank.bsky.social and colleagues:
'Pushing the limit of triplet–triplet annihilation photon upconversion towards the UVC range' 🔥
#OpenAccess 🔓
'Pushing the limit of triplet–triplet annihilation photon upconversion towards the UVC range' 🔥
#OpenAccess 🔓
Pushing the limit of triplet–triplet annihilation photon upconversion towards the UVC range
Triplet–triplet annihilation photon upconversion (TTA-UC) provides a milder alternative to traditional UVB/UVC photochemistry. However, suitable sensitizer-annihilator pairs are scarce, in particular…
buff.ly
June 4, 2025 at 12:02 PM
New Hot article from @ckerzig.bsky.social, @gloriusfrank.bsky.social and colleagues:
'Pushing the limit of triplet–triplet annihilation photon upconversion towards the UVC range' 🔥
#OpenAccess 🔓
'Pushing the limit of triplet–triplet annihilation photon upconversion towards the UVC range' 🔥
#OpenAccess 🔓
Excited to share the publication of “Enhancing the Statistical Probability Factor in Triplet-Triplet Annihilation Photon Upconversion via TIPS Functionalization” in @chemicalscience.rsc.org
pubs.rsc.org/en/content/a...
pubs.rsc.org/en/content/a...
October 7, 2025 at 8:44 AM
Excited to share the publication of “Enhancing the Statistical Probability Factor in Triplet-Triplet Annihilation Photon Upconversion via TIPS Functionalization” in @chemicalscience.rsc.org
pubs.rsc.org/en/content/a...
pubs.rsc.org/en/content/a...
Very excited to announce that I will be a Royal Society University Research Fellow (URF)! This will enable me to expand my team and purchase the specialist equipment required to make upconversion nanoparticles easier to synthesize and to develop them as biomedical research tools. #ChemSky
August 19, 2025 at 11:11 AM
Very excited to announce that I will be a Royal Society University Research Fellow (URF)! This will enable me to expand my team and purchase the specialist equipment required to make upconversion nanoparticles easier to synthesize and to develop them as biomedical research tools. #ChemSky
Upconversion nanoparticles are as tough as nails - you can even use them to tag explosives, as set out in this paper by the group of Hirsch! #UCNPs #upconversion
pubs.acs.org/doi/full/10....
pubs.acs.org/doi/full/10....
January 12, 2026 at 4:38 PM
Upconversion nanoparticles are as tough as nails - you can even use them to tag explosives, as set out in this paper by the group of Hirsch! #UCNPs #upconversion
pubs.acs.org/doi/full/10....
pubs.acs.org/doi/full/10....
However, they also say the following...
"In certain example embodiments, the user may manually start the process of image upconversion as well"
Which to me sounds like "We might offer the option to upscale even when running on battery power, if the user opts into that reduced battery time".
"In certain example embodiments, the user may manually start the process of image upconversion as well"
Which to me sounds like "We might offer the option to upscale even when running on battery power, if the user opts into that reduced battery time".
January 1, 2025 at 3:44 PM
However, they also say the following...
"In certain example embodiments, the user may manually start the process of image upconversion as well"
Which to me sounds like "We might offer the option to upscale even when running on battery power, if the user opts into that reduced battery time".
"In certain example embodiments, the user may manually start the process of image upconversion as well"
Which to me sounds like "We might offer the option to upscale even when running on battery power, if the user opts into that reduced battery time".
Blinking upconversion nanoparticles enable < 1 nm super-resolution imaging #upconversion #optics #chemsky
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Spontaneous and indefinite blinking in upconverting nanoparticles for ångström-precision multicolour super-resolution imaging - Nature Nanotechnology
Compositionally engineered, spontaneously blinking upconverting nanoparticles enable multicolour super-resolution imaging with a single excitation source and achieve localization precision down to 0.6...
www.nature.com
July 29, 2026 at 9:26 AM
Blinking upconversion nanoparticles enable < 1 nm super-resolution imaging #upconversion #optics #chemsky
www.nature.com/articles/s41...
www.nature.com/articles/s41...