
Ken Seddon's seminal paper which started the surge of interest in ionic liquids has now reached over 1000 citations
"Ionic liquids for clean technology" Seddon KR, J Chem Technol & Biotechnol 68 (1997) 351-356
An additional two papers published in Pure and Applied Chemistry in 2000 are also (statistically) on their way to break the glass ceiling of 1000 citations.