BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Global NMR Discussion Meetings - ECPv6.16.5.1//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://www.globalnmr.org
X-WR-CALDESC:Events for Global NMR Discussion Meetings
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:UTC
BEGIN:STANDARD
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20250101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=UTC:20260630T150000
DTEND;TZID=UTC:20260630T160000
DTSTAMP:20260622T080336Z
CREATED:20260306T183219Z
LAST-MODIFIED:20260622T080336Z
UID:1792-1782831600-1782835200@www.globalnmr.org
SUMMARY:Yifan Quan
DESCRIPTION:Pentacene: excited triplet\, molecular spin\, polarizing agent\, or quantum sensor?  \nMolecular spin based quantum sensors offer a range of advantages\, from high spin density to functionalization via chemical tunability. Here\, we demonstrate AC vector sensing using the photoexcited spin triplet of deuterated pentacene molecules\, operating at zero external magnetic field and room temperature. We achieve full three-dimensional microwave field reconstruction by detecting the Rabi frequencies of anisotropic spin-triplet transitions associated with two crystallographic orientations of pentacene in naphthalene crystals. We further introduce a phase alternated protocol that extends the rotating-frame coherence time by an order of magnitude. Additionally\, we demonstrate a sizable increase in the coherence time of a pentacene electron spins by hyperpolarizing the proton spin bath via triplet dynamic nuclear polarization. The polarized nuclear spin bath provides a reduced magnetic noise environment\, leading to enhanced electron spin coherence. These results establish pentacene-based molecular spins as a practical and high-performance platform for microwave sensing and nuclear spin as a practical and controllable route to engineering the platform. \n8:00 AM California or 11:00 AM Boston or 5:00 PM Paris or 8:30 PM Delhi
URL:https://www.globalnmr.org/upcoming-discussions/yifan-quan/
ATTACH;FMTTYPE=image/jpeg:https://www.globalnmr.org/wp-content/uploads/2026/03/Yifan_Quan.jpg
END:VEVENT
END:VCALENDAR