Yes. Google Scholar’s "Cited by" filter sorted by date will show that his 1960s–80s work on solvophobic interactions and electron correlation continues to be cited in 2023–2024 journals.
The Google Scholar record for Oktay Sinanoğlu paints the picture of a giant in his field. The search results confirm that while the scientist is gone, his intellectual capital remains active. The data serves as a testament to a career that bridged the gap between complex quantum mechanics and practical chemistry, ensuring that Oktay Sinanoğlu remains a relevant figure in the "new" era of scientific discovery.
He is best known for developing the MET for atoms and molecules, which addressed the "electron correlation" problem in quantum mechanics.