Kẹ́místrì
Àǹfààní máa ń wà nígbà gbogbo pé ìṣàwárí sáyẹ́ǹsì kan, bí radium, lè ṣe ènìyàn láǹfààní.
— (1921)
Small molecule kan lẹ untreated PTFE mọ́, lẹ́yìn náà ethanol wẹ́ e kúrò
JACS paper kan report fluoro-crown ether phosphate adhesive tí ó bond notoriously inert PTFE nínú lab lap-shear test, tí ó sì remain removable ní ethanol washing. CyclicFP-fmoc dé 1.3 MPa lórí untreated PTFE pẹ̀lú ductile cohesive failure, related variant sì dé 2.3 MPa. Mechanism supported nípasẹ̀ spectroscopic evidence fún fluorine-fluorine interaction ní PTFE pẹ̀lú hydrogen bonding àti pi-stacking nínú adhesive. Ó jẹ́ promising materials result, kì í tíì ṣe commercial glue, universal recycling fix tàbí full environmental-safety assessment.
Ìdè mẹ́ta carbon-bismuth fi ibi tí àwòrán sigma àti pi textbook ti dẹ́kun ṣiṣẹ́ hàn
Ìwádìí kan nínú Science ṣe àyẹ̀wò molecular ion CBi-, cousin heavy-element ti àwọn species pẹ̀lú ìdè mẹ́ta tí a mọ̀, pẹ̀lú cryogenic photoelectron spectroscopy àti relativistic quantum calculations. Abajade náà jẹ́ evidence taara pé strong spin-orbit coupling lè tún classical sigma/pi bonding framework ṣètò sí relativistic Kramers pairs tí total angular momentum ń ṣe label. Èyí kò sọ pé ordinary chemical bonding jẹ́ aṣìṣe; ó fi hàn ìdí tí bookkeeping fi yí padà lẹ́gbẹ̀ẹ́ atom tó wuwo gan-an.
Solid material kan yí visible blue light padà sí UV ní sunlight-level intensity — ṣùgbọ́n kì í ṣe solar-energy machine
Àwọn olùwádìí engineer DHI-based organic crystals tí alkyl side chains wọn ń dá π-electron system láàbò láìdá triplet energy dúró láti rìn. Best iBu-DHI/Ir(ppy)₃ solid film ṣe visible-to-UV triplet-annihilation upconversion pẹ̀lú 1.9% absolute quantum yield àti threshold 1.2 mW cm⁻² nítòsí solar intensity ní ayíká 445 nm. Èyí jẹ́ real materials advance fún solid-state photon upconversion. Kì í ṣe working solar device, kì í ṣe ‘free UV,’ kì í sì ṣe proof pé visible sunlight ti lè drive useful UV chemistry ní scale.